The sum of n terms of an A.P. is 3n2 + 5n, then 164 is its
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1
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How many terms are there in 20, 25, 30 . . . . . . 140?
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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 a, b, c are in A.P., then (a – c)2/ (b2 – ac) =
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4
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If the nth term of an A.P. is 2n + 1, then the sum of first n terms of the A.P. is
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5
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What is the sum of the first 13 terms of an arithmetic progression if the first term is -10 and last term is 26?
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6
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The common difference of the A.P. \(\frac{1}{3}, \frac{{1 - 3b}}{3} , \frac{{1 - 6b}}{3}\) . . . . . . is
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7
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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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8
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The number of terms of the A.P. 3, 7, 11, 15, ....... to be taken so that the sum is 406 is
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9
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The 3rd and 7th term of an arithmetic progression are -9 and 11 respectively. What is the 15th term?
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10
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If 18, a, b - 3 are in A.P. then a + b =
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