What are the values of a1 and r of the geometric series?
2 – 2 + 2 – 2 + 2
a. a1 = 2 and r = –2
b. a1 = –2 and r = 2
c. a1 = –1 and r = 2
d. a1 = 2 and r = –1

Consider the given geometric series:

2-2+2-2+2

"A geometric series is a series with a constant ratio between successive terms".

Here, we can observe that the first term 'a' is '2'.

And the common ratio 'r' =

Therefore, the first term 'a' is 2 and common ratio 'r' is '-1'.

So, Option D is the correct answer.

this answer is !