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Let the sum of the first three terms of ...

Let the sum of the first three terms of an A.P be 39 and the sum of its last four terms be 178. Ifthe first term of this A.P. is 10, then the medianof the A.P. is

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The sum of first four terms of an A.P. is 56 and the sum of it's last four terms 112. If its first term is 11 then find the number of terms in the A.P

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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.

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.