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Problem
Problem
Let
f
f
f
be a one-one function with domain
{
21
,
22
,
23
}
\{21, 22, 23\}
{
21
,
22
,
23
}
and range
{
x
,
y
,
z
}
\{x, y, z\}
{
x
,
y
,
z
}
. It is given that exactly one of the following statements is true and the remaining two are false.
f
(
21
)
=
x
,
f
(
22
)
≠
x
,
f
(
23
)
≠
y
f(21) = x, f(22) \neq x, f(23) \neq y
f
(
21
)
=
x
,
f
(
22
)
=
x
,
f
(
23
)
=
y
. Then
f
−
1
(
x
)
f^{-1}(x)
f
−
1
(
x
)
is:
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