What is the sum of the first 12 terms of an arithmetic progression if the first term is 19 and last term is 36?
192
230
102
204
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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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If a, b, c are in A.P., then (a – c)^{2}/ (b^{2} – ac) =
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15th term of A.P., x  7, x  2, x + 3, ........ is
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4
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(1) + (1 + 1) + (1 + 1 + 1) + ....... + (1 + 1 + 1 + ...... n  1 times) = ......
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5
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The 3rd and 6th term of an arithmetic progression are 13 and 5 respectively. What is the 11th term?
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6
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Find the n^{th} term of the following sequence :
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7
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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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8
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How many 2digit positive integers are divisible by 4 or 9?
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9
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In an A.P., if d = 4, n = 7, an = 4, then a is
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10
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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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