. centre de ressources dilemmes et doutes le visage humain de mathématiques Qui sommes-nous Problème de mois activités de promotion babillard
Centrale des maths - centraledesmaths.uregina.ca
Dilemmes & doutes
« D & D »
. .
topic card  



liste de
. .
nouvelle recherche

27 articles trouvés pour ce sujet.
y = f(x) 2018-12-30
yogita pose la question :
What is the actual meaning of "f(x)" ? Please give me full explanation
Penny Nom lui répond.
Solve the equation completely cos 2x = 1 2017-06-08
Lava pose la question :
Solve the equation completely cos 2x = 1
Penny Nom lui répond.
2^a, 2^b, 1^1 and 1^0 2017-03-17
Émile pose la question :
If you had 2^a = 4 and 2^b = 4 you could assume that a = b right? Yet we can observe that 1^1 and 1^0 both equal 1, yet 1 = 0 isn't true. So if given a log base 1 number 1 the would the answer be 1 AND 0?
Penny Nom lui répond.
x^2 = -16 2016-12-12
A student pose la question :
x to the second power = -16

what number solves the equation?

Penny Nom lui répond.
y = mx + c and Ax + By + C = 0 2016-10-18
Erick pose la question :
please explain to me how to convert an equation from the form y=mx+c to Ax+By+C=o form.
Penny Nom lui répond.
A tangent to y = x^3 2015-05-31
Brayden pose la question :
Show that a tangent line drawn to the curve y=x^3 at the point (d,f (d)), where d>0, forms a right triangle with the x and y axes in quadrant 4 whose area is (2/3)d^4.
Penny Nom lui répond.
sin x = cos x 2015-01-23
Mubashir pose la question :
there are two curves y=sinx and y=cosx intersecting at point where x is less than 90 and greater than 0.to find the point I made a equation sinx=cosx but donot know what to do further .please help me by solving this equation sinx=cosx also tell me that have you solved this equation by reference to the graph or by other means please do elaborate your solution in your answer.
Penny Nom lui répond.
Solve sin3x = cos2x 2014-07-14
Emanuel pose la question :
If sin3x=cos2x, find the value of x when x<0<90'
Penny Nom lui répond.
The slope of the line y=-2x+5 2013-12-29
victoria pose la question :
what is the slope of the line with the equation y=-2x+5
Penny Nom lui répond.
Solve x = ln(x) 2013-07-19
Udayan pose la question :
Sir/Madam, How to find the solutions of the equation, x = ln(x)
Penny Nom lui répond.
How can we draw the equation "x+y=1" in 3d? 2013-05-03
shimaa pose la question :
how can we draw the equation "x+y=1" in 3d
Robert Dawson lui répond.
A chart for y=mx+b 2013-03-11
jacinda pose la question :
how to make a chart for y=mx+b
Penny Nom lui répond.
Plotting y=f(x)+2 2013-01-21
Gavin pose la question :
how would you plot y=f(x)+2
Penny Nom lui répond.
An equation of the form y=mx 2012-04-17
Samiya pose la question :
what would be an equation of the form y=mx with the points (-2, 6) and (1, -3) for the line?
Penny Nom lui répond.
The equation of a line 2012-03-26
Danielle pose la question :
Hello, could you help me figure out what the equation of the line is in the form of Ax+By=C with the points (-2,0) and (0,3)? Thank You!
Penny Nom lui répond.
A line tangent to f(x)=1/x 2011-06-05
Michael pose la question :
A line tangent to f(x)=1/x in the first quadrant creates a right triangle with legs the x-axis and the y-axis. Prove that this triangle is always 2 square units regardless of where the point of tangency is.
Penny Nom lui répond.
If ac = bc ... 2011-01-04
jamielle pose la question :
if ac=bc, then a is not equal to b, c is not equal to zero
Penny Nom lui répond.
Reflection in the line y = x 2010-07-21
tousif pose la question :
Find the 2 x 2 matrix which represents a reflection in the line y = x? Please help....
Penny Nom lui répond.
1^3 + 2^3 + 3^3 +4^3 ... n^3 = ? 2010-01-29
ireimaima pose la question :
Can u please help me with this question.. I find that when i test eg: n=2 for n (n+1) /4, it seems that it does not giving me the right answer of 1^3 + 2^3 = 9 but 3/2... i'm confuse..can u please help me..thanks so much

Prove that: 1^3 + 2^3 + 3^3 +4^3………………………………..n^3 = n (n+1) /4

Penny Nom lui répond.
x^x = 1 2009-08-28
Waleed pose la question :
Robert Dawson lui répond.
A word problem involving y = mx + b 2009-04-24
Devon pose la question :
I need to put the following question in to y=mx+b form

I rent a gym for $150.00 for 30 students. Another time I rent the gym for @270.00 for 70 students. I need to also find a fixed rate.

Stephen La Rocque lui répond.
The graph of y = 4x^-4 2009-04-07
lyric pose la question :
tell whether the graph opens up or down.write an equation of the axis of symmetry

Penny Nom lui répond.
A line parallel to a given line 2009-02-18
Lisa pose la question :
I'm having a hard time understanding the concept of how to write an equation of the line containing the given points and parallel to the given line.
Express the answer in the form of y=mx+b. (7,9); 2x+5y=4. i would appreciate it alot if someone can show ne how to do this. Thank you, Lisa

Penny Nom lui répond.
Plotting a function 2007-12-06
Paula pose la question :
My son has a problem that says plot the point: 2x-3y=9
I have explained to him that there must be a function for y in order to plot that point, but he doesn't think so. The question above that one says find the function for y, and I assume we should use that function. Am I wrong? Can we plot a point without a y function.

Stephen La Rocque lui répond.
y=mx+b 2007-05-29
molly pose la question :
Im having a problem with the y=mx+b for our homework we have a table that goes from 0 to 6 , 1 to 7 and 2 to 8 and we have to make a equation of that. Please help.
Penny Nom lui répond.
A riddle 2003-11-19
Sarah pose la question :
Ok, our teacher gave us this riddle, and I cannot for the life of me figure it out. He said that there are three problems with the following proof:
Penny Nom lui répond.
1 = 0.999... 2001-04-13
Joan pose la question :
I have a middle grade math question for you. I would like to know why .9999... = 1 ? I can not use algebra to show this or the following: We agree that 2 = 2 and that 2-2 = 0, so

0.000... = 0 therefore 0.9 = 1
----------OR--------------- 1/3 = 0.333333 and 3 X 1/3 = 1, so if 3 X 0.333... = 0.999... then 0.999... = 1

My teacher says that I can not use the above example to show why this is true, and that I must use a couple different examples. He says that there are several other ways. Do you know any? I could really use the help because I can't think of any other ways to show this is true. Thanks for any help you can give.

Penny Nom lui répond.



Centrale des maths reçoit une aide financière de l’Université de Regina et de The Pacific Institute for the Mathematical Sciences.



accueil centre de ressources accueil Société mathématique du Canada l'Université de Regina PIMS