If
d
d
x
(
f
(
4
x
2
)
)
=
7
x
2
\displaystyle {\frac{{{d}}}{{{\left.{d}{x}\right.}}}}{\left({f{{\left({4}{x}^{{{2}}}\right)}}}\right)}={7}{x}^{{{2}}}
d
x
d
(
f
(
4
x
2
)
)
=
7
x
2
.
Calculate
f
′
(
x
)
=
\displaystyle {f}'{\left({x}\right)}=
f
′
(
x
)
=
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