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Mathematics, 14.04.2021 23:50 ToxicMonkey

Given that the 3rd term in an arithmetic sequence is 12, the 4th term is 22.5, and the 2nd term is 5, tell me what the 1st term in the sequence is.

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Given that the 3rd term in an arithmetic sequence is 12, the 4th term is 22.5, and the 2nd term is 5...
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