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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How many terms are there in the GP 5, 20, 80, 320........... 20480?
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2
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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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3
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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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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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The sum of first five multiples of 3 is:
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6
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If sum of n terms of an A.P. is 3n2 + 5n and Tm = 164 then m =
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7
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Find the 15th term of the sequence 20, 15, 10 . . . . .
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8
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Let S denotes the sum of n terms of an A.P. whose first term is a. If the common difference d is given by d = Sn – k Sn-1 + Sn-2 then k =
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9
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If a, b, c are in A.P., then (a – c)2/ (b2 – ac) =
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10
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If 18th and 11th term of an A.P. are in the ratio 3 : 2, then its 21st and 5th terms are in the ratio
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