Question

Find the sum of n terms of an AP 8,16,24,32......

Answer 1

Given AP
8,16,24,32

Given data...
a=8
d=16-8=8
n=4
an or l(last term)=32
Formula...sn=n/2(a+l)
sn=4/2(8+32)
sn=2*40
sn=80
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