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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The sum of first five multiples of 3 is:
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In an A.P., if d = 4, n = 7, a_{n} = 4, then a is
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For an A.P. if a25  a20 = 45, then d equals to:
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Find the nth term of the following sequence :
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How many terms are there in 20, 25, 30 . . . . . . 140?
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If a, b, c are in A.P., then (a – c)^{2}/ (b^{2} – ac) =
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If a + 1, 2a + 1, 4a  1 are in A.P., then the value of a is:
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The 2^{nd} and 8^{th} term of an arithmetic progression are 17 and 1 respectively. What is the 14^{th} term?
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Which term of the A.P. 92, 88, 84, 80, ...... is 0?
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If S1 is the sum of an arithmetic progression of ‘n’ odd number of terms and S2 is the sum of the terms of the series in odd places, then \(\frac{{{S_1}}}{{{S_2}}}\)
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