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Mathematics
Mathematics
Problem
Explain why the composite function
(
g
∘
f
)
(
x
)
(g\circ f)(x)
(
g
∘
f
)
(
x
)
is undefined at
x
=
0
x=0
x
=
0
when
f
(
x
)
=
x
f(x)=\sqrt{x}
f
(
x
)
=
x
and
g
(
t
)
=
1
t
g(t)=\dfrac{1}{t}
g
(
t
)
=
t
1
.
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