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Byju's Answer
Standard VII
Mathematics
Properties of Multiplication of Integers
Binary operat...
Question
Binary operation a*b=a+b-5 and find identity element?
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Solution
Dear Student,
Let
e
be
the
identity
element
in
R
for
the
binary
operation
*
,
then
a
*
e
=
a
=
e
*
a
⇒
a
*
e
=
a
⇒
a
+
e
-
5
=
a
⇒
e
-
5
=
0
⇒
e
=
5
So
,
5
is
the
identity
element
in
R
for
the
binary
operation
*
.
Regards
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