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Mathematics
Mathematics
Problem
For which one of the following functions is the second derivative test inconclusive at
x
=
0
x=0
x
=
0
? a)
f
(
x
)
=
x
2
f(x)=x^{2}
f
(
x
)
=
x
2
b)
f
(
x
)
=
cos
x
f(x)=\cos x
f
(
x
)
=
cos
x
c)
f
(
x
)
=
x
3
f(x)=x^{3}
f
(
x
)
=
x
3
d)
f
(
x
)
=
sin
x
f(x)=\sin x
f
(
x
)
=
sin
x
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