The first term of an AP is 5, the last term is 45 and the sum is 400. Find the number of terms and the common difference

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asked Feb 2, 2018 in Mathematics by Kundan kumar (49,132 points) 34 379 1010
The first term of an AP is 5, the last term is 45 and the sum is 400. Find the number of terms and the common difference.

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answered Feb 2, 2018 by Vikash Kumar (144,729 points) 8 11 21
 
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