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Given l=28, S=144,and there are total …

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Given l=28, S=144,and there are total 9 terms. Find a

Posted by Prashant Chandila Prashant Chandila 7 years, 2 months ago

CBSE > Class 10 > Mathematics

2 answers

Deepak Choudhary 7 years, 2 months ago

Sn=n/2(a+l) 144=9/2(a+28) 288=9(a+28) 32=a+28 a=32-28 a=4

1Thank You

Ananya Sharma 7 years, 2 months ago

a=4

0Thank You

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