Let `x, |x-1| and |x+1|` be the first three terms of a G.P. then sum of the series `1/x + 1/|x-1| + 1/|x+1| + ... oo` is equal to

Let x , |x-1| and |x + 1| be the first three terms of a G.P. then sum of the series (1)/(x)+ (1)/(|x-1|)+(1)/(|x+1|)+cdots oo is equal to

If x,|x+1|,|x-1| are first three terms of an A.P., then the sum of its first 20 terms is

If x,|x+1|,|x-1| are first three terms of an A.P., then the sum of its first 20 terms is

If |x||,|x-1|,|x+1| are first three terms of an A.P.then sum of the first to terms is lambda, the value of (lambda)/(5) is equal to

Find the sum of the series 1 + (1 + x) + (1 + x + x^2) + ... to n terms, x≠ 1

x<-1 and x,|x+1|,|x-1| are in AP.The sum of first twenty terms of the AP is

If o x1, then find the sum of the series log(1xlog(1+x log(1x to n terms log(1

For x>0 the sum of the series (1)/(1+x)-(1-x)/((1+x)^(2))+((1-x)^(2))/((1+x)^(3))-...oo is equal to

The sum of n terms of the series (1)/(1 + x) + (2)/(1 + x^(2)) + (4)/(1 + x^(4)) + ……… is