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)