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Problem
Problem
If
f
(
x
)
=
2
x
f(x)=2x
f
(
x
)
=
2
x
and
g
g
g
is identity function, then (a)
(
f
∘
g
)
(
x
)
=
g
(
x
)
(f\circ g)(x)=g(x)
(
f
∘
g
)
(
x
)
=
g
(
x
)
(b)
(
g
∘
g
)
(
x
)
=
g
(
x
)
(g\circ g)(x)=g(x)
(
g
∘
g
)
(
x
)
=
g
(
x
)
(c)
(
f
∘
g
)
(
x
)
=
(
g
∘
g
)
(
x
)
(f\circ g)(x)=(g\circ g)(x)
(
f
∘
g
)
(
x
)
=
(
g
∘
g
)
(
x
)
(d) None of these
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