Asked by Riya

The first term of a geometric sequence is 3 and the sum of the second and third terms is 60. determine T1,T2, T3,
and Tn
Answered by oobleck
3r + 3r^2 = 60
r^2 + r - 20 = 0
(r+5)(r-4) = 0
so the two sequences are
3,12,48, ...
3,-15,75, ...