The sum of first n odd natural numbers in
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1
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The 2^{nd} and 6^{th} term of an arithmetic progression are 8 and 20 respectively. What is the 20^{th} term?
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2
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What is the sum of the first 12 terms of an arithmetic progression if the first term is 19 and last term is 36?
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3
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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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4
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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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5
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If a, b, c are in A.P., then (a – c)^{2}/ (b^{2} – ac) =
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6
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Sum of n terms of the series \(\sqrt 2 + \sqrt 8 + \sqrt {18} + \sqrt {32} + \) ....... is
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7
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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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8
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If Sn denote the sum of the first n terms of an A.P. If S2n = 3Sn , then S3n : Sn is equal to
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9
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A square is drawn by joining the mid points of the sides of a given square in the same way and this process continues indefinitely. If a side of the first square is 4 cm, determine the sum of the areas all the square.
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10
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The sum of the first four terms of an A.P. is 56. The sum of the last four terms is 112. If its first term is 11, the number of terms is
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