What is the value of identity element e so that a*e=a=e*a, where a*b=+?
a
2a
As we learnt
Invertible Binary operation -
a*b = e = b*a
- wherein
e be the identity element for the binary operation * on A and a,b A
Option 1)
a
Option 2)
Option 3)
Option 4)
2a
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