Question

What are the values of a, and r of the geometric series?

2-2+2-2+2
a = 2 and r=-2
a = -2 and r = 2
aq=-1 and r = 2
az = 2 and r=-1

Answer 1

a = 2; r = -1

Explanation:

a is the first term: 2

r is the ratio of successive terms: -2/2 = 2/-2 = -1.

Answer 2

a = 2; r = -1

Explanation:

a is the first term: 2

r is the ratio of successive terms: -2/2 = 2/-2 = -1.