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Mathematics
Problem
Explain why the inverse of the function $f: \mathbb R \to \mathbb R
g
i
v
e
n
b
y
given by
g
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v
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nb
y
f(x)=x^{2}
i
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o
t
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f
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t
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o
n
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s
s
t
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d
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m
a
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n
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f
is not a function unless the domain of
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s
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t
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f
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t
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l
ess
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main
o
f
f$ is suitably restricted.
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