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In an AP the first term …

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In an AP the first term is 2, the last term is 29 and the sun of the terms is 155, find the common difference of AP

Posted by Dheeraj Bhot 5 years, 10 months ago

CBSE > Class 10 > Mathematics

3 answers

Nisha Agarwal 5 years, 10 months ago

Firstly use 2nd formula of sum of n terms which is sn= n/2(a+l) From this you will get n= 10 Then use 1st formula of =sn= n/2[2a+(n-1)d] From this u will get the ans which is 3.

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Nisha Agarwal 5 years, 10 months ago

Use sum of n terms formula

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Nisha Agarwal 5 years, 10 months ago

Common difference is 3

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