How many terms of the AP : 9, 17, 25, ... must be taken to give a sum of 636?

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asked Mar 14, 2018 in Mathematics by shabnam praween (19,050 points) 5 6 8
How many terms of the AP : 9, 17, 25, ... must be taken to give a sum of 636?

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answered Mar 14, 2018 by mdsamim (213,225 points) 5 10 15
selected Mar 20, 2018 by faiz
 
Best answer

Let sum of n terms be 636.

Thus, the sum of 12 terms of given AP is 636.

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