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What is the value of

+1 vote

Taking a=1,b=2,c=3

For making calculation more simple, a=b=c=1 can also differentiate all the four options right ?
May be...but if u have take a=0 then ??
no, if a=0 then option a , b and c will be same = 0. So we can not take a=0.

+1 vote