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If the sum of first 7 terms of an AP is 49 and that of 17 terms is 289,find sum of first n terms

Posted by Rishi Kumar Sandaka 1 year, 4 months ago

CBSE > Class 10 > Mathematics

1 answers

Xyz Xyz 1 year, 4 months ago

7=49=7^2 17=289=17^2 n=n^2

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