0 votes 0 votes Find the set of values of x for which expansion of (9+ 5x)^ -1/2 Is valid in ascending powers of x. a)(0,9/5) b)(-9/5,0) c)(-9/5,9/5) d)none Surya Dhanraj asked Sep 9, 2017 Surya Dhanraj 212 views answer comment Share Follow See all 0 reply Please log in or register to add a comment.