Let . Which of the following is…

MATHEMATICS · Single correct · A Level · Mathematics · Differentiation · Differentiation

Problem

Let

f(x)=7x^{\tfrac{4}{3}}

. Which of the following is

f'(x)

? (a)

\dfrac{4}{3}x^{\tfrac{1}{3}}

(b)

\dfrac{28}{3}x^{\tfrac{1}{3}}

(c)

\dfrac{28}{3}x^{-\tfrac{1}{3}}

(d)

\dfrac{28}{3}x^{\tfrac{4}{3}}