If 18, a, b - 3 are in A.P. then a + b =
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Find the 15th term of the sequence 20, 15, 10 . . . . .
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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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The sum of n terms of an A.P. is 3n2 + 5n, then 164 is its
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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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For an A.P. if a25 - a20 = 45, then d equals to:
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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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How many terms are there in the GP 5, 20, 80, 320........... 20480?
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If S1 is the sum of an arithmetic progression of ‘n’ odd number of terms and S2 is the sum of the terms of the series in odd places, then \(\frac{{{S_1}}}{{{S_2}}}\)
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Find the nth term of the following sequence :
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The 2nd and 8th term of an arithmetic progression are 17 and -1 respectively. What is the 14th term?
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