1.

In a G.P., the first term and common ratio is a and r respectively. If Sn denotes the sum of n terms and Un=n∑n=1Sn, then rSn+(1−r)Un is equal to

Answer»

In a G.P., the first term and common ratio is a and r respectively. If Sn denotes the sum of n terms and Un=nn=1Sn, then rSn+(1r)Un is equal to



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