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The sum of n terms of an ap is sn =2nsquare +6n find the first term and the common difference |
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Answer» ONG>ANSWER: sn=2n²+6n S2=2(2)²+6(2)=8+12=20=a+a2 =>a2=20-a=20-8=12 d=a2-a=12-8=4 |
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