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Q)
Let
f
(
x
)
=
x
|
x
|
,
g
(
x
)
=
s
i
n
x
and
h
(
x
)
=
(
g
o
f
)
(
x
)
.Then
(a)
h
(
x
)
is not differential at
x
=
0
(b)
h
(
x
)
is differential at
x
=
0
but
h
′
(
x
)
is not continuous at
x
=
0
(c)
h
(
x
)
is continuous at
x
=
0
but
h
′
(
x
)
is not differential at
x
=
0
(d)
h
′
(
x
)
is differential at
x
=
0
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