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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The 2nd and 6th term of an arithmetic progression are 8 and 20 respectively. What is the 20th term?
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2
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How many terms are there in the GP 5, 20, 80, 320........... 20480?
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3
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If log 2, log (2x -1) and log (2x + 3) are in A.P, then x is equal to ___
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4
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The common difference of the A.P. \(\frac{1}{{2b}} \frac{{1 - 6b}}{{2b}} \frac{{1 - 12b}}{{2b}}\) . . . . . is
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5
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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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6
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Find the nth term of the following sequence :
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7
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If the 3rd and the 5th term of an arithmetic progression are 13 and 21, what is the 13th term?
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8
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Find the 15th term of the sequence 20, 15, 10 . . . . .
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9
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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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10
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In an A.P., if d = -4, n = 7, an = 4, then a is
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