If a, b, c are in A.P., then (a – c)2/ (b2 – ac) =
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The two geometric means between the number 1 and 64 are
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2
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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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3
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What is the sum of the first 12 terms of an arithmetic progression if the 3rd term is -13 and the 6th term is -4?
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4
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Which term of the A.P. 92, 88, 84, 80, ...... is 0?
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5
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If the first term of an A.P. is 2 and common difference is 4, then the sum of its 40 term is
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6
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Find the 15th term of the sequence 20, 15, 10 . . . . .
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7
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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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8
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Sum of n terms of the series \(\sqrt 2 + \sqrt 8 + \sqrt {18} + \sqrt {32} + \) ....... is
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9
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The 2nd and 8th term of an arithmetic progression are 17 and -1 respectively. What is the 14th term?
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10
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The nth term of an A.P., the sum of whose n terms is Sn, is
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