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4The nth term of an A.P. is 2n + 7. Findsum of the first four terms |
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Answer» Answer: nth term 2n + 7 then , 1st term = 2(1) + 7 = 9 2nd term = 2(2) + 7 = 11 3rd term = 2(3) + 7 = 13 4th term = 2(4) + 7 = 15
so sum of first four terms = 9+11+13+15 = 48 |
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