Question

Suppose R '(1) = 14.
If f(x) = R(4x), find f ' (1/4)?

Answer 1

what is it?

Answer 2

?

Answer 3

where is the problem come from? which grade? which course?

Answer 4

Calculus I

Answer 5

what does R mean?

Answer 6

nothing just like if it were F

Answer 7

so? f (x) = R (4x)
f'(x) = R'(4x) * (4x) '=4 R' (4x)
f'(1/4) = 4 R'(4*1/4) = 4 R'(1) , just plug R'(1) in to get f'(1/4)

Answer 8

Oh okay I forgot to multiply by the derivative of the inside as well thanks!