Let r(t) be a differentiable function that is positive and increasing. The rate of increase of r^3 is equal to 12 times the rate of increase of r when r(t)=
How would I go about setting this up to solve it? thanks for the help.
that is all the question says. It is a multiple choice question if that would help? The five choices are :
the cube root of 4
two
the cube root of 12
two times the square root of 3
six
The answer key says the answer is two, I guess taking the derivative of each and setting equal works since 3r^2=12 , thus r=2 thanks for the help