find the sum of first 8multiply of 3
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A=3
l=8x3=24
n=8
Sn=n/2(a+l)
=4x(3+24)
4x(27)
=108
l=8x3=24
n=8
Sn=n/2(a+l)
=4x(3+24)
4x(27)
=108
Imzan:
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