If the 3rd and the 5th term of an arithmetic progression are 13 and 21, what is the 13th term?
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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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In an A.P., if d = 4, n = 7, a_{n} = 4, then a is
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Consider an infinite G.P. with first term a and common ratio r, its sum is 4 and the second term is 3/4, then
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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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5
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The sum of first n odd natural numbers in
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6
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The 4th and 7th term of an arithmetic progression are 11 and 4 respectively. What is the 15th term?
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7
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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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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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What is the sum of the first 11 terms of an arithmetic progression if the 3rd term is 1 and the 8th term is 19?
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10
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For A.P. T18  T8 = ........ ?
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