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What are the values of a1 and r of the geometric series? 2 – 2 + 2 – 2 + 2
Geometric series is a series of numbers where the ratio between any two consecutive terms is always the same.
Answer: The values of \(a_1\) and r are 2 and -1 respectively.
Let us find the values of \(a_1\) and r.
The terms in the geometric series are 2, -2, 2, -2, ...
The first term is 2. So, \(a_1\) = 2
r is the common ratio, which is the ratio of any two consecutive terms.
Common Ratio = -2 / 2 = 2/(-2) = -1
So, r is -1
Therefore, the values of \(a_1\) and r are 2 and -1, respectively.