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Mathematics
Problem
Let
f
(
x
)
=
7
x
4
3
f(x)=7x^{\tfrac{4}{3}}
f
(
x
)
=
7
x
3
4
. Which of the following is
f
′
(
x
)
f'(x)
f
′
(
x
)
? a)
4
3
x
1
3
\dfrac{4}{3}x^{\tfrac{1}{3}}
3
4
x
3
1
b)
28
3
x
1
3
\dfrac{28}{3}x^{\tfrac{1}{3}}
3
28
x
3
1
c)
28
3
x
−
1
3
\dfrac{28}{3}x^{-\tfrac{1}{3}}
3
28
x
−
3
1
d)
28
3
x
4
3
\dfrac{28}{3}x^{\tfrac{4}{3}}
3
28
x
3
4
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