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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1
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The sum of first five multiples of 3 is:
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2
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The common difference of the A.P. \(\frac{1}{{2b}} \frac{{1  6b}}{{2b}} \frac{{1  12b}}{{2b}}\) . . . . . is
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3
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Find the first term of an AP whose 8th and 12th terms are respectively 39 and 59.
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4
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What is the sum of the following series? 64, 66, 68, ......, 100
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5
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What is the sum of the first 13 terms of an arithmetic progression if the first term is 10 and last term is 26?
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6
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The sum of the first 16 terms of an AP whose first term and third term are 5 and 15 respectively is
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7
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Two A.P.’s have the same common difference. The first term of one of these is 8 and that of the other is 3. The difference between their 30th terms is
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8
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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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9
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If the sum of three consecutive terms of an increasing A.P. is 51 and the product of the first and third of these terms is 273, then the third term is :
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10
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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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