Question:

Find a1 and d for the arithmetic series. S12 = -108, a12 = -20 a1 = _____.

Find a1 and d for the arithmetic series. S12 = -108, a12 = -20 a1 = _____.

Find a1 and d for the arithmetic series. S12 = -108, a12 = -20 a1 = _____.

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