ques 13

dear student

as x1,x2 and x3 are odd integerslet x1=2a-1x2=2b-1 and x3=2c-1x1+x2+x3=51a+b+c=27number of positive integral solutions of a+b+c=27 is=C3-127-1=C226=26*252=325

regards

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