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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For A.P. T18  T8 = ........ ?
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The sum of n terms of an A.P. is 3n2 + 5n, then 164 is its
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The 2^{nd} and 8^{th} term of an arithmetic progression are 17 and 1 respectively. What is the 14^{th} term?
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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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How many 2digit positive integers are divisible by 4 or 9?
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15th term of A.P., x  7, x  2, x + 3, ........ is
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If the nth term of an A.P. is 2n + 1, then the sum of first n terms of the A.P. is
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What is the sum of the first 12 terms of an arithmetic progression if the 3^{rd} term is 13 and the 6^{th} term is 4?
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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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The common difference of the A.P. \(\frac{1}{{2b}} \frac{{1  6b}}{{2b}} \frac{{1  12b}}{{2b}}\) . . . . . is
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