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The derivative of x^1/3 2015-11-08
omar pose la question :
hi can help me
am teacher ask me about x^1/3 Derivation definition .

Penny Nom lui répond.
The train fares are proportional to the square root of distance traveled 2014-01-11
manish pose la question :
train fares are proportional to the sq .root of distance traveled. the train fare is Rs. 24.4 for a distance of 140 kms. by how much % does the total fare increase if the same distance is covered by breaking the journey after every 35 kms.
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.
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.
The derivative of f(x) = (x+1)^1/2 2011-09-05
Carla pose la question :
Find the derivative using the limit process of
f(x) = (x+1)^1/2

Harley Weston lui répond.
Using the limit definition 2010-06-06
Meagan pose la question :
Using the limit definition find the derivative of 3/(2x^2)
Harley Weston 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.
The derivative of f(x)=1/(x-1) 2007-09-21
Michelle pose la question :
im having trouble finding the derivative of f(x)=1/(x-1) using the f(x+h)-f(x)/h method.
Stephen La Rocque lui répond.
Direct variation 2007-05-07
Jennifer pose la question :
assume that y varies directly as x. find y when x = 54 if y =1/4 when x=3/2
Stephen La Rocque lui répond.
Direct variation 2006-11-05
Johann pose la question :
The perimeter of regular octagon varies directly with the length of one side of the octagon
Stephen La Rocque lui répond.
 
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