1.

Without adding the sum find 11+13+15+17+19+21+23+25

Answer» HEY mate!!

I am finding by ARITHMETIC formula

here a =11 ,d=13-11=2 and n=8
so, sum=n/2(2a+(n-1)d)
=8/2(22+14)
=4*36
=144

hope it helps!!


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