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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Sum of n terms of the series \(\sqrt 2 + \sqrt 8 + \sqrt {18} + \sqrt {32} + \) ....... is
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2
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If the sum of n terms of an A.P. is 3n2 + 5n then which of its terms is 164 ?
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3
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A boy agrees to work at the rate of one rupee on the first day, two rupees on the second day, and four rupees on third day and so on. How much will the boy get if he started working on the 1st of February and finishes on the 20th of February?
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4
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The 3rd and 9th term of an arithmetic progression are -8 and 10 respectively. What is the 16th term?
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5
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If the 7th term of a H.P. is 1/10 and the 12th term is 1/25, then the 20th term is
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6
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The nth term of an A.P., the sum of whose n terms is Sn, is
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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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The first and last term of an A.P. is a and l respectively. If S is the sum of all the terms of the A.P. and the common difference is given by \(\frac{{{l^2} - {a^2}}}{{k - \left( {l + a} \right)}}\) then k = ?
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9
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The 3rd and 8th term of an arithmetic progression are -13 and 2 respectively. What is the 14th term?
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10
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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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