If log 2, log (2^{x} 1) and log (2^{x} + 3) are in A.P, then x is equal to ___
5/2
log_{2}5
log_{3}2
3/2
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The 2nd and 8th term of an arithmetic progression are 17 and 1 respectively. What is the 14th term?
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What is the sum of the first 12 terms of an arithmetic progression if the first term is 19 and last term is 36?
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3
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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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4
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Sum of n terms of the series \(\sqrt 2 + \sqrt 8 + \sqrt {18} + \sqrt {32} + \) ....... is
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5
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If four numbers in A.P. are such that their sum is 50 and the greatest number is 4 times the least, then the numbers are
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6
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If the sum of p terms of an A.P. is q and the sum of q terms is p, then the sum of (p + q) terms will be
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7
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In an A.P., if d = 4, n = 7, an = 4, then a is
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8
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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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9
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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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10
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If 18th and 11th term of an A.P. are in the ratio 3 : 2, then its 21st and 5th terms are in the ratio
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