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Find the sumof first 22 terms …

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Find the sumof first 22 terms of in AP in which d=7and 22nd term is 149

Posted by Ramesh Dabhi 5 years, 3 months ago

CBSE > Class 10 > Mathematics

4 answers

Atul Raman 5 years, 3 months ago

1661

Adarsh Awasthi 5 years, 3 months ago

22 term= a+21d =a+21×7=a+ 14 7...... 149=a+147.........a=149-147=2 .......... S²²=22/2×(2+149) ==== 11×151=== 1661

Kratagya Rathore 5 years, 3 months ago

Oo sorry 1661

Kratagya Rathore 5 years, 3 months ago

161

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