1.

Let f be a differentiable function defined for all x ∈ R such that f(x3) = x5 for all x ∈ R, x ≠ 0. Then the value of \(\dfrac{df}{dx} (8)\) is:

A. 5/3
B. None of these
C. 20
D. 20/3
Answer» E.


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