The 3^{rd} and 7^{th} term of an arithmetic progression are 9 and 11 respectively. What is the 15^{th} term?
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If k, 2k – 1 and 2k + 1 are three consecutive terms of an AP, the value of k is
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If a, b, c are in A.P., then (a – c)^{2}/ (b^{2} – ac) =
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The common difference of the A.P. \(\frac{1}{3}, \frac{{1  3b}}{3} , \frac{{1  6b}}{3}\) . . . . . . is
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4
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For A.P. T18  T8 = ........ ?
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The first term of an Arithmetic Progression is 22 and the last term is 11. If the sum is 66, the number of terms in the sequence are:
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If the sum of n terms of an A.P. be 3n2 + n and its common difference is 6, then its first term is
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In an A.P., if d = 4, n = 7, a_{n} = 4, then a is
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15th term of A.P., x  7, x  2, x + 3, ........ is
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If an A.P. has a = 1, tn = 20 and sn = 399, then value of n is :
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If the sum of the series 2 + 5 + 8 + 11 … is 60100, then the number of terms are
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