the third fourth and fifth terms of a geometric progression are t+4,t+10 and t+20 respectively .determine the common ratio and first term.

Command ratio 4

Correct

How did you come up with the answer

Show the working

How did you come up with that answer

How did you come up with the answer

since the ratio is fixed,

(t+10)/(t+4) = (t+20)/(t+10)
t=5
Now just finish it off