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The second term of an arithmetic sequence is 7, the sum of the first four terms in the arithmetic sequence is 12, find the first term and the common difference

The second term of an arithmetic sequence is 7, the sum of the first four terms in the arithmetic sequence is 12, find the first term and the common difference
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The second term of an arithmetic sequence is 7, the sum of the first four terms in the arithmetic sequence is 12, find the first term and the common difference

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User John Peralta
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1 Answer

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Consider the following short explanation.
Answer: a1=15; d= -8.
The second term of an arithmetic sequence is 7, the sum of the first four terms in-example-1
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User Investigator
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