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If a=7 and a13=35, then find d and S13....

If `a=7` and `a_13=35`, then find `d and S_13`.

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To solve the problem step by step, we will find the common difference \( d \) and the sum of the first 13 terms \( S_{13} \) of the arithmetic progression (AP). ### Step 1: Identify the given values We are given: - First term \( a = 7 \) - 13th term \( a_{13} = 35 \) ### Step 2: Use the formula for the nth term of an AP ...
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