Question

Find the 8th term of the geometric sequence 7, -21, 63, ...7,−21,63

Answer 1

With the gap "..." we don't know what the 8th term would be.

Answer 2

Looks like another of those posts where numerical stuff is duplicated. Haven't figured out why that happens so much.

If the sequence is 7, -21, 63 ...
then
a = 7
r = -3
and the 8th term is 7*(-3)^7 = -15309

Answer 3

Thank you