The 3rd and 7th term of an arithmetic progression are 9 and 11 respectively. What is the 15th term?
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If log 2, log (2^{x} 1) and log (2^{x} + 3) are in A.P, then x is equal to ___
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Find the 15th term of the sequence 20, 15, 10 . . . . .
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The sum of first n odd natural numbers in
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The number of terms of the A.P. 3, 7, 11, 15, ....... to be taken so that the sum is 406 is
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What is the sum of the first 9 terms of an arithmetic progression if the first term is 7 and last term is 55?
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6
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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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What is the sum of all positive integers up to 1000, which are divisible by 5 and are not divisible by 2?
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8
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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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If sum of n terms of an A.P. is 3n^{2} + 5n and T^{m} = 164 then m =
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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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