Question

यदि A.B = A , B.A = B तो सिद्ध कीजिए कि A.A = A , B.B = B

Answer 1

Here is ur answer..
Given
A.B=A
B.A=B

Prove
A.A=A
B.B=B

Proof
If A.B=A and B.A=B,
Similarly,
A.A=A and B.B=B
Hence Proved