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Mathematics
Mathematics
Problem
If
f
(
x
)
=
0
f(x) = 0
f
(
x
)
=
0
for
x
<
0
x < 0
x
<
0
and
f
(
x
)
f(x)
f
(
x
)
is differentiable at
x
=
0
x = 0
x
=
0
, then for
x
>
0
x > 0
x
>
0
,
f
(
x
)
f(x)
f
(
x
)
may be a.
x
2
x^2
x
2
b.
x
x
x
c.
−
x
-x
−
x
d.
−
x
3
/
2
-x^{3/2}
−
x
3/2
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