Find the sumof first 22 terms of in AP in which d=7and 22nd term is 14

1.	Find the sumof first 22 terms of in AP in which d=7and 22nd term is 149
Answer» 1661 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 Oo sorry 1661 161

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