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The sum of the first four terms of an A...

The sum of the first four terms of an A.P. is 56. The sum of the last four terms is 112. If its first term is 11, then find the number of terms.

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To solve the problem step by step, we will use the properties of an Arithmetic Progression (A.P.). ### Step 1: Understanding the problem We are given: - The sum of the first four terms of an A.P. is 56. - The sum of the last four terms is 112. - The first term (A) is 11. ...
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