its given that the sum of its sixth term is 42,the ratio of its 10 and 30 term is 1:2 find the first n terms
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The sum of first six terms of an AP is 42. The ratio of 10th term to its 30th term is 1:3.calculate the fist ... its given that ... S6 = n/2 ( 2a + (n-1 ...
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S6 =42a + 9d 1------------ = -------a + 29d 3cross multiply we get3a + 27d = a +29 d2a
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