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 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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2
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How many 2-digit positive integers are divisible by 4 or 9?
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3
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If the sum of the series 2 + 5 + 8 + 11 … is 60100, then the number of terms are
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4
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What is the sum of the first 12 terms of an arithmetic progression if the 3rd term is -13 and the 6th term is -4?
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5
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A square is drawn by joining the mid points of the sides of a given square in the same way and this process continues indefinitely. If a side of the first square is 4 cm, determine the sum of the areas all the square.
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6
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The first and last term of an A.P. is a and l respectively. If S is the sum of all the terms of the A.P. and the common difference is given by \(\frac{{{l^2} - {a^2}}}{{k - \left( {l + a} \right)}}\) then k = ?
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7
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In an A.P., if d = -4, n = 7, an = 4, then a is
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8
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The common difference of the A.P. \(\frac{1}{3}, \frac{{1 - 3b}}{3} , \frac{{1 - 6b}}{3}\) . . . . . . is
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9
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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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10
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If four numbers in A.P. are such that their sum is 50 and the greatest number is 4 times the least, then the numbers are
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