In a geometric sequence, t4=5x-11, t5=x+5, and t6=x-1. Find the sum(s) of the infinite series if it (or they) exsit(s).

We have solutions ,  Use r, and the t4 value, to go backwards and find t1, which will tell you the "a" value. (There will be two choices.) Can you find the Sum? Sum = a1/ (1-r)