Will give brainliest and five stars for correct answer #2 find an equation for the nth term of the arithmetic sequence. -15, -6, 3, 12, answer choices: a: an = -15 + 9(n + 1) b: an = -15 x 9(n - 1) c: an = -15 + 9(n + 2) d: an = -15 + 9(n - 1)

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General Formula for arithmetic series :
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an = a₁ + d(n – 1)

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Find equation :
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a₁ = -15 and d = 9,

 

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  (Answer D)
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