Sum of n terms of the series \(\sqrt 2 + \sqrt 8 + \sqrt {18} + \sqrt {32} + \) ....... is
\(\frac{{n\left( {n + 1} \right)}}{2}\)
\(2n\left( {n + 1} \right)\)
\(\frac{{n\left( {n + 1} \right)}}{{\sqrt 2 }}\)
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The 4th and 7th term of an arithmetic progression are 11 and -4 respectively. What is the 15th term?
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2
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The sum of first five multiples of 3 is:
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3
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The first term of an Arithmetic Progression is 22 and the last term is -11. If the sum is 66, the number of terms in the sequence are:
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4
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If 18, a, b - 3 are in A.P. then a + b =
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5
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The common difference of the A.P. \(\frac{1}{{2b}} \frac{{1 - 6b}}{{2b}} \frac{{1 - 12b}}{{2b}}\) . . . . . is
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6
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What is the sum of the first 12 terms of an arithmetic progression if the first term is -19 and last term is 36?
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7
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The 2nd and 6th term of an arithmetic progression are 8 and 20 respectively. What is the 20th term?
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8
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The sum of n terms of an A.P. is 3n2 + 5n, then 164 is its
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9
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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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10
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Find the first term of an AP whose 8th and 12th terms are respectively 39 and 59.
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