Sujet: inverse liste de sujets
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	Inverse		2005-10-18
		Pauline pose la question : Défi ! a et b désignent deux nombres distincts non nuls. Peut-on trouver un nombre à retrancher du numérateur et du dénominateur du quotien a/b pour obtenir son inverse b/a? Claude Tardif lui répond.
	Algebra		2019-11-06
		Krizhia pose la question : How is y= 1/2 * (x-1)² be x= √2y + 1. Please show me the steps Penny Nom lui répond.
	Solve for x in Y=1.5x + log (1+x)		2018-12-23
		Asadollah pose la question : Please restate below expression in terms of y Y=1.5x + log (1+x) Thanks Penny Nom lui répond.
	The inverse square law		2018-06-05
		Amy pose la question : Question about inverse square law ; Hi, I'm trying to understand some nuances about this law and have been reading about it a lot online and trying out some homework for personal interest (hobby ) - not school related. I understand that the simple formula is ; 1/d^2 I was wondering about what appears to be an oddity to me, that I came across when I was working with a test example I found at this link ; http://www.softschools.com/formulas/physics/inverse_square_law_formula/82/ The problem that caught my interest was this one on that page ; "1) If a bright flashlight has a light intensity of 15.0 candela at a distance 1.00 m from the lens, what is the intensity of the flashlight 100.0 m from the lens?" So I have a few different questions about this, but the most important one is, what does it mean if we replace the "1" in ; 1/d^2 with a different value such as a ratio in the form of a decimal value, so instead we have something like this ; 0.75/d^2 ??? Does this ratio represent a curve then? I am thinking that the "1" in the normal formula represents a straight line Some of the links I was researching ; http://wisptools.net/book.php?c=3&s=2 http://www.softschools.com/formulas/physics/inverse_square_law_formula/82/ https://www.nde-ed.org/GeneralResources/Formula/RTFormula/InverseSquare/InverseSquareLaw.htm Penny Nom lui répond.
	The inverse of y=x^2+x+c		2016-12-21
		Sam pose la question : What is the inverse of y=x^2+x+c for x? Penny Nom lui répond.
	The inverse of y = x(x - 2)		2016-12-21
		Sasha pose la question : Hello, I recently stumbled upon this question and I haven't been able to figure it out. Why is the inverse of y=x(x-2) not a function? Suggest a domain restriction which would ensure that the inverse is a function. Thank You :) Penny Nom lui répond.
	The derivative of the inverse of a function		2016-10-28
		Kate pose la question : Hi, I'm in a College level Calculus course and I can't seem to figure out the answer to this question. Find the derivative of f^-1(4) if f(3)=4 and f'(3)=1/7 Penny Nom lui répond.
	The inverse function for f(x)=2x^2+5x		2016-04-23
		Ashini pose la question : The inverse function for f(x)=2x^2+5x Penny Nom lui répond.
	The inverse of a function		2016-03-20
		Billy pose la question : f(x) = Square root(x^2 + 2x) What is the inverse? Penny Nom lui répond.
	tan inverse 1/4		2016-03-14
		nazz pose la question : prove; tan inverse 1/4=1/3 cot inverse 52/47 Chris Fisher lui répond.
	Solve x=r(t-sin(t)) for t		2015-02-28
		David pose la question : I don't know how to write the function of t(x) by x=r(t-sin(t)). Can you teach me that? Harley Weston lui répond.
	The inverse of f(x) = x^2 - x		2014-08-22
		Tyler pose la question : Find the Inverse function of: f(x) = x^2 - x Robert Dawson lui répond.
	The inverse of y = 5^x		2014-03-07
		Melody pose la question : how do you find the inverse of y = 5^x Penny Nom lui répond.
	Inverse trig functions		2013-05-19
		ky pose la question : hello, so iv'e been asked to draw a triangle with sides of 3, 4, and 5. And find the measure of all three angle using sin-1, cos-1, tan-1. I got really confuse, I'm taking the SAT pretty soon and it would be great to get this... THANX Penny Nom lui répond.
	How do i write log_8(P) =7 in exponential form?		2013-04-14
		nancy pose la question : How do i write this in exponential form log8P =7 Penny Nom lui répond.
	If 4 cooks can bake 8 pies in 6 hours?????		2013-03-18
		Kenneth pose la question : Hello: I want to determine which quantities are directly and inversely proportional in order to determine the answer for the following:. If 4 cooks can bake 8 pies in 6 hours, 2 cooks can bake how many pies in 4 hours? Answer: 2 2/3 pies Can someone fully explain what I need to know in order to determine what is directly and inversely proportional in the example above? I thank you for your reply. Robert Dawson lui répond.
	The inverse of y = x^2 - 2x		2012-04-20
		Shona pose la question : How do I Find the inverse of the function y= x^2 - 2x ? Penny Nom lui répond.
	The length is inversely proportional to the width		2012-03-18
		David pose la question : For a given set of rectangles, the length is inversely proportional to the width. In one of these rectangles, the length is12 and the width is 6. For this set of rectangles, calculate the width of a rectangle whose length is 9 Penny Nom lui répond.
	If x ix directly proportional to y then ...		2012-02-19
		Crystal pose la question : I understand that we say x and y are proportional, then y = kx. Generally when we say x is proportional to y, we think that when x increases y increases. Now I am questioning whether that is actually true. If k is negative, then when x increases, y DECREASES. My question is does this mean this statement is incorrect: If x is proportional to y, when x increases, y increases proportionally. Is it more correct to say: If x is proportional to y, when x increases, y either increases proportionally or decreases proportionally. Along the same line of reasoning, when x is inversely proportional to y, we think that when x increases y decreases, but that is true only if k is positive. Is that correct? Harley Weston lui répond.
	Properties of real numbers applied to subsets		2012-02-01
		Mark pose la question : Hello - The questions that I have for you is do the properties of real numbers (such as the associative, commutative, identity, inverse, and distributive law) apply to ALL the subsets of real numbers? In other words, do all those properties work for the Natural Numbers? The Whole Numbers? And so on and so forth. I understand that they are all real numbers, but for instance: the identity is whenever you add zero to a number, you get that number back. But does that work with, say, with only the odd numbers? Zero isn't odd so can that property actually apply to JUST the odd numbers? Any consideration would be greatly appreciated! Robert Dawson lui répond.
	sin x = -0.25		2011-03-29
		Wayne pose la question : How do you solve for x in the equation sin x = -0.25 the answer is 3.394 and 6.030 but I don't know the steps they used to calculate this Penny Nom lui répond.
	tanθ=1.192		2011-01-15
		Adori pose la question : Use a calculator to approximate two values of the θ (0 ≤θ≤2π) that satisfy the equation. a) tanθ=1.192 I do not understand how to find the second value of θ. Harley Weston lui répond.
	Angle of incline		2010-01-20
		Alan pose la question : how do I fnd the angle of an incline with a measurement of 0.042 with an adjacent of 1.2mtrs?. Thank You Penny Nom lui répond.
	The domain, range and inverse of a relation		2010-01-08
		Nazrul pose la question : Given that A={-2,-1,0,1,2}, S={(x,y): x belongs to A, y belongs to A and y^2=x}. How can I find the domain and range of the relation S. What is the inverse relation of S. Please show me the process in details. Thank you. Penny Nom lui répond.
	The inverse of f(x)=-1/x^2		2009-10-22
		Jasmine pose la question : how to solve f(x)=-1/x^2 --> find f-1[x], than state if its a function Harley Weston lui répond.
	The inverse of F(x)=x^2-6x+13, for x>3		2009-07-26
		Juan pose la question : The function F is given by F(x)=x^2-6x+13, for x>3. A. Write F(x) in the form (x-a)^2+b B.Find the inverse function F^-1 C.State the domain of F^-1 Penny Nom lui répond.
	Direct and inverse relationships		2009-04-06
		allison pose la question : A piece of string is cut into n pieces of equal lengths L (1) does n vary directly or inversely with L Penny Nom lui répond.
	Direct, inverse and indirect proportionality		2009-03-04
		Brian pose la question : My 14 year old is confused about indirectly proportional and inversely proportional. On searching on the internet we were directed to: http://mathcentral.uregina.ca/QQ/database/QQ.09.00/ellis1.html Here leanne starts explaining indirectly proportional and ends up describing inversely proportional. Has Leanne got it wrong ? What is indirectly proportional. Thanks Brian Chris Fisher lui répond.
	y varies jointly as x and the square of z and...		2009-01-05
		peter pose la question : I don't really get the terms in this problem. Could you explain it: If y varies jointly as x and the square of z and inversely as the cube of w, by what factor is y increased when z is doubled and w is divided by 3 and x remains the same? Harley Weston lui répond.
	What is f^-1(3) when f(x)=2x-1?		2009-01-03
		Peter pose la question : how do you do functions like f^-1(3) when f(x)=2x-1? Penny Nom lui répond.
	The inverse function for F(x)=x^3+x		2008-12-18
		alireza pose la question : I want inverse function for F(x)=x^3+x Robert Dawson lui répond.
	Inverse variation		2008-05-22
		leria pose la question : In Boyle's law, the pressure of gas varies inversely with the volume of the gas. A volume of 11.2 liters of air exerts a pressure of 2.0 atmospheres. determine the constant of variation and write an equation the models the relationship between the pressure of the gas P and its volume, V. Use the equation to predict the volume of air necessary to exert a presure of 0.25 atmospheres. Janice Cotcher lui répond.
	The inverse of a function		2008-05-03
		keith pose la question : please help me find the inverse of this function: h(t) = 2 + 4 ln(1-5t) Stephen La Rocque lui répond.
	Two function problems		2008-04-10
		keith pose la question : find the domain: F(x)= 1/ {ln (x+5) - ln (7-x)} find the inverse: g(t)= sqrt {2-3 ln (1-t)} Penny Nom lui répond.
	cosec [arccos (1/y)]		2008-04-09
		Tom pose la question : I am having trouble with this question. For y > 1, the value of cosec [arccos (1/y)] is? Penny Nom lui répond.
	Inverses of functions		2008-03-13
		jess pose la question : if g(x)=2x+3 find g^-1(g(4)) how do I sovle I cant's figure out what to do with the 4 Stephen La Rocque lui répond.
	Direct and inverse variations		2007-11-27
		Julie pose la question : Please Help I do not understand this question. X varies directly as the square of S and inversely as T. How does X change when S is doubled ? When both S and T are doubled ? I appreciate your help with this problem. Stephen La Rocque lui répond.
	A matrix equation		2007-11-16
		stephanie pose la question : Im supposed to solve ( 1 tan =E8/2) ( 1 tan =E8/2)^(-1) (-tan =E8/2 1 ) (-tan =E8/2 1 ) Matrix AA<(-1)=I Penny Nom lui répond.
	Variation		2007-10-29
		deeqa pose la question : 1. A car traveled 175mi at a certain speed. If the speed had been 20mph faster, the trip could have been made in 1hr less time. Find the speed 2. The average weekly allowance A of children varies directly as their grade level, G. If the average allowance of an 8th-grade student is $8.56 per week, what is the average weekly allowance of a 5th-grade The time T required to do a job varies inversely as the number of people P working. It takes 2hr for 4 working. It takes 2 hrs for 4 volunteers to distribute flyers to a neighborhood. How long would it take 12 volunteers to complete the job? Penny Nom lui répond.
	Inverses of Quadratic Functions		2007-10-11
		Elliot pose la question : I'm a special education tchr trying to demonstrate how to find the inverse (using algebra) of quadratic functions. Any help would be greatly appreciated. Steve La Rocque and Harley Weston lui répond.
	What is the inverse function of y=x^3 +x?		2007-09-19
		saman pose la question : what is the inverse function of y=x^3 +x Harley Weston lui répond.
	Linear systems and inverses		2007-08-06
		Marsia pose la question : explain how inverses are used to solve linear systems. Penny Nom lui répond.
	Direct and inverse Variation		2007-04-03
		liz pose la question : how do you tell if an equation varies Directly or Inversely? ex. x= 2y or xy+12=3 i know that if you have three numbers (x. y, z) that it varies jointly but how do you tell if it is Inverse or Direct? Thanks for the Help! -liz Stephen La Rocque lui répond.
	What does inverse graph represent?		2007-03-30
		san pose la question : what does inverse graph represent? Penny Nom lui répond.
	Is the inverse of a function always a function?		2007-03-29
		San pose la question : Is the inverse of a function always a function? Please justify. Thank You! Penny Nom lui répond.
	The angles in a right triangle		2007-03-28
		Golaan pose la question : I need the to understand the formula for finding either of the acute angles of a right triangle given it's hieght length and base length. I want to find the degrees of either accute angle. So for this example I have a right triangle with a height of 410 meters and a base length of 1,700 meters. I don't understand cosine, sine, and tangent or the other ones at all. So if the solution includes those (which I believe it does) could b very verbose yet in a very elementary way? The purpose of ths is that I have to define the general incline angles (or grade) of various areas of terrain. I know the distance by map and also the the altitude at either endpoint. Penny Nom lui répond.
	Direct and inverse variation		2007-03-03
		Rene pose la question : Hi I'm Rene, I'm stuck with some problems in direct and inverse variation. I know how to solve direct and inverse problems when only one variation is in a question at a time. EX: p varies inversely as the square root of q, and when p=12, q=36 find p when q=16 12*6 =p*4 72=4p 18=p But how would you solve a problem like..... If s varies directly as r and inversely as t, and s=10 when r=5 and t=3, for what value of t will s=3 when r=4 ? Penny Nom lui répond.
	Direct and Inverse variation		2006-10-27
		Vishalinee pose la question : i'm not sure how to use the words direct variation and inverse variation to describe thre relationship between: a. speed and distance b.speed and time c. distance and time. and then i need to create equations using the descriptions. i am really messed up with direct and inverse variation. Karen McIver lui répond.
	Finding the inverse of a function		2006-04-12
		Sam pose la question : If g(x) = 2x+3/5 then how do I find the inverse? Walter Whiteley lui répond.
	y = log(x) + x. Solve for x.		2005-08-26
		Alain pose la question : I have the following equation: y = ln(x) + x How do I solve for x? Penny Nom lui répond.
	Angle of incline		2005-05-15
		Kyle pose la question : What is the degree of incline of a 12 foot plank that goes from 10.5 inches on one end to zero inches on the other? Penny Nom lui répond.
	The gradiant of a hill is 9%		2004-12-18
		Jim pose la question : The gradiant of a hill is 9%. What angle is created by the run/rise of the hill and 0 degrees? Penny Nom lui répond.
	Direct and inverse variation		2004-10-05
		Abraham pose la question : Given that y varies inversely as x and x varies directly as z.If z is doubled then y is halved.Why is that true.Please explain.I'm having trouble understanding the different types of variation Penny Nom lui répond.
	An inverse		2004-09-09
		Hillary pose la question : I cannot figure out the inverse of this function. f(x)= 1/2x -1 Penny Nom lui répond.
	d varies inversely with g		2004-09-07
		Ashlyn pose la question : d varies inversely with g when d=-8 and g=2 a. write d as a function of g using function notation. b. find d(10). Penny Nom lui répond.
	The inverse of a quintic function		2004-07-22
		A student pose la question : I'm really having trouble finding out the inverse of this quintic equation. F(X)= X5+3X3+1.I know that this quintic has an inverse because it is one to one. But I can't find a method to solve this. Finding the inverse of a quadratic or a cubic equation is a lot easier, but with this quintc I am really lost. I even know how the graph of this equation and its inverse looks like, but I'm not sure if Iam getting the right equation. Please help me out. Penny Nom lui répond.
	Finding angles		2003-12-02
		Jason pose la question : I AM TRYING TO SOLVE A TRIG PROBLEM AND HAVE FORGOT HOW TO DO IT. WHAT I HAVE IS A RIGHT TRIANGLE WITH SIDE A BEING 14 FEET AND SIDE B BEING 3 FEET, USING PYTHAGOREAMS THEOREM SIDE C SHOULD EQUAL 14.318 FEET ON A RIGHT TRIANGLE BUT I AM TRYING TO REMEMBER HOW TO FIND MY ANGLES OTHER THAN THE ONE THAT IS 90 DEGREES. Penny Nom lui répond.
	Differentiating inverses		2002-11-20
		Amy pose la question : f(x)= x3+x+1, a=1 find g'(a) (g = f -1). I am having trouble finding g(a). Penny Nom lui répond.
	Matrix		2001-11-21
		Hoda pose la question : I have a question about matrix multiplication; well, actually, matrix division. I am assuming that matrices are divided the same as they are multiplied; that is, row by column. But what happens if you have to divide by zero? How does this affect the resulting matrix? Patrick Maidorn and Penny Nom lui répond.
	Proportionality: direct and indirect		2001-01-18
		Nancy Ellis pose la question : What is the difference between directly proportional and indirectly proportional? Leeanne Boehm lui répond.
	cot(arcsin 3/5)		2001-01-07
		Jason pose la question : Find value. Assume that all angles are in Quadrant 1. cot(arcsin 3/5) Harley Weston lui répond.
	Direct and inverse variation		2000-12-12
		Ashley pose la question : I'm stuck on this unit of direct and inverse variation..please and my problems and show me how to do each PLEASE!!! Assume that y varies directly as x If y= -4 when x = 2, find y when x= -6 Assume that y varies inversely as x If y =-4 when x=2, find y when x =-6 Penny Nom lui répond.
	Triangles and trigonometry		2000-11-30
		Mose pose la question : If I have a right triangle, and I know the lengths of all three sides, is there a formula that will allow me to determine the measurements of the 2 non right angles? Harley Weston lui répond.
	Range of a function		2000-11-21
		David Bell pose la question : Given a rational function such as f(x) = (8x-3)/(4x-1). How can the range be found. Penny Nom lui répond.
	Using the inverse sine function		2000-05-31
		Nelson Rothermel pose la question : This has me completely baffled. I have to use the laws of sine or cosine to find the angles of a triangle when I have 3 sides, so I can't go 180-x-y when I have 2 angles. Now, I have a triangle with values of 3, 7, and 9. Here are the steps I used (A,B,C are angles; a,b,c are opposite sides): angle A (16.1951 degrees): cos-1*((b2+c2-a2)/(2*b*c)) angle B (40.6011 degrees): sin-1*(b*sin(A)/a) angle C (56.7962 degrees): sin-1*(c*sin(A)/a) If you notice, A+B+C does not equal 180. According to the book, A and B are correct, but C is supposed to be 123.2038 degrees. Why doesn't it work??? Harley Weston lui répond.
	Graphing cube roots		2000-04-27
		Heather Jones pose la question : What do the graphs of cube roots look like? Walter Whiteley lui répond.
	Cos x = -1/2		1999-12-01
		Pierre Boivin pose la question : When I factor[ 2cos (square) - 5cos -3], I get (2cos + 1)(cos - 3). 2cos + 1 = 0, 2cos = -1, cos = -0.5,. Using inv cos on calculator, I get 120 degree related angle. When I graph I get two values, between 90 and 180 degree and between 180 and 270 degrees. How do I find those two values. How do use 120 degree in relation with the x axis. Penny Nom lui répond.
	Domain and Range of a Function		1999-11-14
		Michelle Mellott pose la question : How do you find the range of the following function: 2y2/(y2+5y+6)?? I know the domain is x not equalled to -2, -3. How can one easily find the range? Harley Weston lui répond.
	Inverses of functions		1999-11-01
		Leanne Hickey pose la question : Let f(x) = 2x2 -3x + 2. Find f-1(4) given the fact that f(2) = 4. So the question is finding the inverse of 4, he said it's easier than it looks. Penny Nom lui répond.
	Matrices		1998-03-10
		Ksya pose la question : A and B are matrices. If A^n=B^n, can we say A=B or det(A)=det(B) or det(A)^n=det(B)^n ? Any conditions ??? If B^(-1) is the inverse of B, where B is a matrices. Can we say [(B^(-1))^n][B^n]=I, where I is identity matrices? Any conditions??? Doug Farenick lui répond.

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