[" Ex.26If "r^(b)" term of a series is "(2r+1)2^(-tau)" ,then sum of its "],[" infinite terms is- "]

If r^(th) term of a series is (2r+1)2^(-r) then sum of its infinite terms is

The rth term of a series is (2r + 1)2^(r ) , find the sum of first n terms of the series.

If the r^(th) term of a series is 1+x+x^(2)+......+x^(r-1), then the sum of the first n terms is

If |r|<1, then the sum of infinite terms of G.P is

If the r^(th) term of a series is 1 + x + x^2 + .......+ x^(r-1) , then the sum of the first n terms is

(1)/(2)+(3)/(4)+(5)/(8) The sum of the series infinite terms is

If n th term of a-series be (2.3^(n-1)+1) ,, find the sum of 1st r terms of the series.

If the nth term of a series be (2.3^(n-1) + 1) , find the sum of first r terms of the series.

The sum of 2n terms of a series in G.P. is 2R and the sum of the reciprocals of those terms is R , find the continued product of the terms.