What is the sum of the first 17 terms of an arithmetic progression if the first term is 20 and last term is 28?
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How many terms are there in 20, 25, 30 . . . . . . 140?
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If the sum of the series 2 + 5 + 8 + 11 … is 60100, then the number of terms are
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Sum of n terms of the series \(\sqrt 2 + \sqrt 8 + \sqrt {18} + \sqrt {32} + \) ....... is
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If three numbers be in G.P., then their logarithms will be in
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Find the 15th term of the sequence 20, 15, 10 . . . . .
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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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The first term of an Arithmetic Progression is 22 and the last term is 11. If the sum is 66, the number of terms in the sequence are:
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The nth term of an A.P., the sum of whose n terms is Sn, is
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The sum of the first and third term of an arithmetic progression is 12 and the product of first and second term is 24, then first term is
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In an A.P., if d = 4, n = 7, an = 4, then a is
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