Question

Give the first four terms of the geometric sequence for which a1 = -7 and r= -4

Answer 1

- 7, 28, - 112, 448

Explanation:

To obtain the next term in a geometric sequence multiply the previous term by r

Given

a₁ = - 7 and r = - 4, then

a₂ = - 7 × - 4 = 28

a₃ = 28 × - 4 = - 112

a₄ = - 112 × - 4 = 448

The first four terms are - 7, 28, - 112, 448