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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1
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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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2
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15th term of A.P., x  7, x  2, x + 3, ........ is
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3
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What is the sum of the first 9 terms of an arithmetic progression if the first term is 7 and last term is 55?
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4
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The sum of the first four terms of an A.P. is 56. The sum of the last four terms is 112. If its first term is 11, the number of terms is
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5
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If the sum of n terms of an A.P. be 3n2 + n and its common difference is 6, then its first term is
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6
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If the sum of p terms of an A.P. is q and the sum of q terms is p, then the sum of (p + q) terms will be
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7
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If the sums of n terms of two arithmetic progressions are in the ratio \(\frac{{3n + 5}}{{5n + 7}}\) then their nth terms are in the ration
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8
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(1) + (1 + 1) + (1 + 1 + 1) + ....... + (1 + 1 + 1 + ...... n  1 times) = ......
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9
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A bacteria gives birth to two new bacteria in each second and the life span of each bacteria is 5 seconds. The process of the reproduction is continuous until the death of the bacteria. initially there is one newly born bacteria at time t = 0, the find the total number of live bacteria just after 10 seconds :
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10
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How many terms are there in the GP 5, 20, 80, 320........... 20480?
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