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If nth term of an A.P is (2n+1) what is the sum of first three terms |
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Answer» nth term = 2n+11st term = 32nd term = 53rd term = 7Sum = 3+5+7= 15 You can solve this asan = 2n + 1Now a1 = 2 (1) + 1 =3a1 = 3 ,Similarly a2 = 2(2) + 1 = 5 a3 = 7 Now sum of first three terms Put the formula And this would be ur answer = 15 I think this is the perfect answer Hope u understand? 15 |
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