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If the sum of first 14 terms of an A.P. is 1050 and its first term is 10, find the `20^(th)` term. |
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Answer» Let common difference be `d` `" " rArr (14)/(2) [ 2(10) + (n-1)d] = 1050` `" "rArr d = 10` `" " a_(20) = a + 19 d` `" " = 10 + 19(10) = 200` |
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