What are the values of a1 and r of the geometric series? 2 – 2 + 2 – 2 + 2

The first term is 2, so a₁ = 2. Each term is found by multiplying the previous term by −1: 2 × (−1) = −2, then −2 × (−1) = 2. Therefore, the correct choice is D, a₁ = 2 and r = −1.

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