Question

Find the sum of first n terms  QUOTE ⬚2 + ⬚8 + ⬚18 + ⬚32+………….n terms

Answer 1

Answer:

sun of first n. terms

Sn=n/2(2a+(n-1)d

here the given problem is infinte set

when only a finite is being solve the sum of n terms

so the first terms sum

Sn=4/2(2×2(4-1)d)

here the problem is not in ap

then how can find sum of n terms