If 
to n terms is S. Then, S is equal to
Thus the nth term would be
nth=(n + 1)/2
the general term would be
rth=(r + 1)/2
We know by property that∑axn + bxn - 1 + cxn - 2…….d0=a∑xn + b∑xn - 1 + c∑xn - 2…….. + d0∑1
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