C-07-Q085mediumsingle_mcqFor the series 1x+1+1(x+1)2+1(x+1)3+…\dfrac{1}{x+1} + \dfrac{1}{(x+1)^2} + \dfrac{1}{(x+1)^3} + \ldotsx+11+(x+1)21+(x+1)31+…, the sum to infinity exists when —a−1<x+1<1-1 < x + 1 < 1−1<x+1<1b∣x+1∣>1|x + 1| > 1∣x+1∣