C-07-Q065mediumsingle_mcqFor the series 12x+1+1(2x+1)2+…\dfrac{1}{2x+1} + \dfrac{1}{(2x+1)^2} + \ldots2x+11+(2x+1)21+… to have sum to infinity, the condition on xxx is —ax>0x > 0x>0 onlybx<−1x < -1x<−1 onlycx<−1x < -1 or