Question

List the first four terms of a geometric sequence with t1 = 4 and tn = -3tn-1.

Answer 1

t2 = -3*t1
t1 = 4
so t2 = -3*4
t2 =-12

t3 = -3 * t2
t3 = 36

t4 = -3*t3
t4 = -108

so the first 4 terms are 4, -12, 36, and -108