Question

Find the next two terms of the series :

2 - 6 + 18 - 54 .......................... .

Answer 1

Given:

a1 = -2
a2 = 6
r = ?

Solution:

r = a2 / a1
r = 6 / -2
r = -3

Answer:

r = -3

next term = -54 $\times$ -3 = 162

next term = 162 $\times$ -3 = -486