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derivative of 9/x
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d
dx
(
9
x
)
=
−
9
x
2
Show Steps
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d
dx
(
9
x
)
=
−
9
x
2
steps
d
dx
(
9
x
)
Take
the
constant
out
:
(
a
·
f
)
′
=
a
·
f
′
=
9
d
dx
(
1
x
)
Apply
exponent
rule
:
1
a
=
a
−
1
=
9
d
dx
(
x
−
1
)
Apply
the
Power
Rule
:
d
dx
(
x
a
)
=
a
·
x
a
−
1
=
9
(
−
1
·
x
−
1
−
1
)
show steps
Simplify
9
(
−
1
·
x
−
1
−
1
)
:
−
9
x
2
=
−
9
x
2
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