An arithmetic series has 3 terms. The sum of first two terms of an arithmetic series is 9 and the product of last two terms is 54, find the terms.
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The sum of an arithmetic series is found by multiplying the number of terms times the average of the first and last terms. Example: 3 + 7 + 11 + 15 + ··· + 99 has a1 = 3 and d = 4. To find n, use the explicit formula for an arithmetic sequence
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