0 votes 0 votes The $n$th element of a series is represented as $X_n = (-1)^n x_{n-1}$ If $X_0 =x$ and $x>0$, then which of the following is always true? $X_n$ is positive if $n$ is even $X_n$ is positive if $n$ is odd $X_n$ is negative if $n$ is even None of these Quantitative Aptitude cat2002 quantitative-aptitude number-systems + – go_editor asked May 2, 2016 • retagged Apr 9, 2022 by Lakshman Bhaiya go_editor 13.9k points 585 views answer comment Share See all 0 reply Please log in or register to add a comment.