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The first and the last term of an AP are 5and 45 respectively.If the sum of all its term is 400 find its common difference.

Posted by Bidya Rani 6 years, 10 months ago

CBSE > Class 10 > Mathematics

1 answers

Nikhar Sanadhya 6 years, 10 months ago

Sn=n/2(a+l) put the formula you get the value of n So the value of n = 16 So apply the formula l=a +(n-1) *d So you get the value of d

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CBSE > Class 10 > Mathematics