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 \(\frac{{{S_1}}}{{{S_2}}}\)
\(\frac{{2n}}{{n + 1}}\)
\(\frac{n}{{n + 1}}\)
\(\frac{{n + 1}}{{2n}}\)
\(\frac{{n  1}}{n}\)
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1
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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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2
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Consider an infinite G.P. with first term a and common ratio r, its sum is 4 and the second term is 3/4, then
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3
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What is the sum of the first 11 terms of an arithmetic progression if the 3rd term is 1 and the 8th term is 19?
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4
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What is the sum of the first 12 terms of an arithmetic progression if the 3^{rd} term is 13 and the 6^{th} term is 4?
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5
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Find the n^{th} term of the following sequence :
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6
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What is the sum of all positive integers up to 1000, which are divisible by 5 and are not divisible by 2?
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7
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If k, 2k – 1 and 2k + 1 are three consecutive terms of an AP, the value of k is
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8
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In an A.P., if d = 4, n = 7, an = 4, then a is
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9
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How many terms are there in 20, 25, 30 . . . . . . 140?
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10
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Which term of the A.P. 24, 21, 18, ............ is the first negative term?
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