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CBSE XII
>>
Math
>>
Relations and Functions
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Q)
On the set
R
−
{
−
1
}
a binary operation
∗
is defined by
a
∗
b
=
a
+
b
+
a
b
for all
a
,
b
∈
R
−
{
−
1
}
. Prove that
∗
is commutative as well as associative on
R
−
{
−
1
}
. Find the identity element on
∗
if any.
(
A
)
0
(
B
)
1
(
C
)
2
(
D
)
3
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