Question

What is the common ratio of the sequence? -2, 6, -18, 54,...

a.-3
b.-2
c.3
d.8

Answer 1

a. -3

Explanation:

-2 turns into 6 by multiplying it by -3.

the same from 6 to -18, from -18 to 54, ...

so, an/an+1 = -3