The 3rd and 7th term of an arithmetic progression are -9 and 11 respectively. What is the 15th term?
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For A.P. T18 - T8 = ........ ?
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2
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If k, 2k – 1 and 2k + 1 are three consecutive terms of an AP, the value of k is
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3
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If the 7th term of a H.P. is 1/10 and the 12th term is 1/25, then the 20th term is
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4
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The sum of first n odd natural numbers in
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5
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The 7th and 12th term of an arithmetic progression are -15 and 5 respectively. What is the 16th term?
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6
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If the fifth term of a GP is 81 and first term is 16, what will be the 4th term of the GP?
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7
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Find the nth term of the following sequence :
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8
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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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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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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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