Question

If x-1,x+1 is a geometric sequence, then x is ?
-1/2, 1/2, 2,1

Answer 1

if you solve it by hit and trial method then you will get 1 as answer and there is no other method to solve this type of questions. you need to check whether after putting the values you are getting a common multiple for both series.
hope it helps ☺️☺️