the sum of three consecutive terms of an arithmetic sequence is 15 and their product is 105. Find the first term?
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Let x,x+d and x+2d be the three numbers. If x=7 then d=-2 and we have 7,5,3 as the numbers. If x=3 then we have 3,5,7 as the numbers. The sum of 3,5,7 is 15 and the product is 105 so the required numbers are 3,5,7.
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