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If the sum of first 7 terms of an A.P. is 49 and t hat of its first 17 terms is 289, find the sum of first n terms of the A.P. CBSE Mathematics1 AnswerIf the ratio of the sum of the first n terms of two A.Ps is (7n + 1) : (4n + 27), then find the ratio of their 9th terms. Mathematics CBSE class 10 20171 AnswerIn an A.P., the sum of its first ten terms is – 80. and the sum of its next ten terms is – 280. Find the A.P. CBSE Mathematics1 AnswerIn an A.P., the sum of its first ten terms is – 80. and the sum of its next ten terms is – 280. Find the A.P. CBSE Mathematics1 AnswerIn an A.P., fhe sum of first ten terms is –150 and the sum of its next ten terms is –550. Find the A.P. CBSE Mathematics1 AnswerThe trigonometric Fourier series of an even function does not have the -gate-ece-20111 AnswerThe sum of first n terms of an AP is 3n^2 + 4n. Find the 25th term of this AP. Mathematics CBSE class 10 20131 AnswerHow many terms of an A.P. 9, 17, 25, .... must be taken to give a sum of 636? Mathematics CBSE class 10 20171 AnswerFor what value of n, are the nth terms of two A.Ps 63, 65, 67,.... and 3, 10,17,..... equal? Mathematics CBSE class 10 20171 AnswerFor what value of k will k + 9, 2k – 1 and 2k + 7 are the consecutive terms of an A.P? Mathematics CBSE class 10 20161 AnswerIf the sum of the first n terms of an AP is 1/2(3n^2 + 7n), then find its n th term. Hence write 20th term? Mathematics CBSE class 10 20151 AnswerIf the ratio of sum of the first m and n terms of a n AP is m 2 : n 2 , show that the ratio of its mth and nth terms is (2m − 1) : (2n − 1). CBSE Mathematics1 AnswerIf the sum of first p terms of an A.P. is ap 2 + bp , find its common difference. CBSE Mathematics1 AnswerIf Sn denotes the sum of first n terms of an AP, prove that S30 = 3[S20 - S10]. Mathematics CBSE class 10 20151 AnswerIf Sn, denotes the sum of first n terms of an AP prove that S12 = 3(S8 - S4). Mathematics CBSE class 10 20151 AnswerExplain the terms horn clauses and satisfiability in terms of logic in computer science.1 AnswerIn an A.P., the first term is 2, the last term is 29 and sum of the terms is 155. Find the common difference of the A.P. CBSE Mathematics1 AnswerFind the common difference of an A.P. whose first term is 4, the last term is 49 and the sum of all its terms is 265. CBSE Mathematics1 AnswerGiven the sequence of terms, AD CG FK JP, the next term is -Mechanical Engineering-gate-20121 AnswerDetermine if the following ratios form a proportion. Also, write the middle terms and extreme terms where the ratios form a proportion.-Mathematics-cbse-std 6th-Ratio and Proportion1 Answer
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If the sum of first 7 terms of an A.P. is 49 and t hat of its first 17 terms is 289, find the sum of first n terms of the A.P. CBSE Mathematics
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