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 = S_{n} – k S_{n1} + S_{n2} then k =
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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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Which term of the A.P. 92, 88, 84, 80, ...... is 0?
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If the sum of n terms of an A.P. is 3n2 + 5n then which of its terms is 164 ?
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The 7th and 21st terms of an AP are 6 and 22 respectively. Find the 26th term
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If an A.P. has a = 1, tn = 20 and sn = 399, then value of n is :
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The 2^{nd} and 6^{th} term of an arithmetic progression are 8 and 20 respectively. What is the 20^{th} term?
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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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(1) + (1 + 1) + (1 + 1 + 1) + ....... + (1 + 1 + 1 + ...... n  1 times) = ......
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A piece of equipment cost a certain factory 6,00,000. If it depreciates in value, 15% the first year, 13.5% the next year, 12% the third year, and so on, what will be its value at the end of 10 years, all percentages applying to the original cost?
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The 3rd and 6th term of an arithmetic progression are 13 and 5 respectively. What is the 11th term?
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