Find the first derivative of
f
(
x
)
=
sin
(
x
)
x
7
\displaystyle {f{{\left({x}\right)}}}=\frac{{\sin{{\left({x}\right)}}}}{{x}^{{7}}}
f
(
x
)
=
x
7
sin
(
x
)
.
f
′
(
x
)
=
\displaystyle {f}'{\left({x}\right)}=
f
′
(
x
)
=
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