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The first and the last term of an A.P ar...

The first and the last term of an A.P are 17 and 350 respectively. If the common difference is 9, how many terms are there and what is their sum ?
OR
Find the sum of first 51 terms of an A.P whose 2nd term and 3rd term aer 14 and 18 respectively.

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The correct Answer is:
Hence, there are 38 terms in A.P having their sum as 6973.
OR
5610
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