Question

Determine 8th term in the

geometric sequence whose first
term is -10 and whose common
ratio is 2.

Answer 1

- 1280

Explanation:

The n th term of a geometric sequence is

`a_(n)` = a₁
`(r)^(n-1)`

here a₁ = - 10 and r = 2, hence

`a_(8)` = - 10 ×
`2^(7)` = - 10 × 128 = - 1280