Q. 165.0( 2 Votes )

Using properties

Answer :

Given;

Taking x from C1, y from C2 and z from C3



C1 C1 +C2 + C3



Taking from C1



R2 R2 – R1 and R3 R3 – R1



Evaluating along C1



= xyz + xy + yz +zx.


Hence Proved


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