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>>
CBSE XII
>>
Math
>>
Relations and Functions
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Q)
Let
f
:
W
→
W
be defined as
f
(
n
)
=
n
-
1
, if
n
i
s
o
d
d
a
n
d
f
(
n
)
=
n
+
1
,
i
f
n
i
s
e
v
e
n
.
Show that
f
is invertible. Find the inverse of
f
. Here,
W
is the set of all whole numbers.
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