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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(1) + (1 + 1) + (1 + 1 + 1) + ....... + (1 + 1 + 1 + ...... n  1 times) = ......
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2
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Which term of the A.P. 24, 21, 18, ............ is the first negative term?
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3
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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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4
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The sum of first n odd natural numbers in
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5
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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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6
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If a + 1, 2a + 1, 4a  1 are in A.P., then the value of a is:
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7
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If log 2, log (2^{x} 1) and log (2^{x} + 3) are in A.P, then x is equal to ___
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8
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For an A.P. if a25  a20 = 45, then d equals to:
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9
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In an A.P., if d = 4, n = 7, a_{n} = 4, then a is
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10
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Find the 15th term of the sequence 20, 15, 10 . . . . .
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