What is the sum of the first 17 terms of an arithmetic progression if the first term is -20 and last term is 28?
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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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2
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How many terms are there in 20, 25, 30 . . . . . . 140?
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3
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Which term of the A.P. 92, 88, 84, 80, ...... is 0?
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4
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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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5
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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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6
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If the nth term of an A.P. is 2n + 1, then the sum of first n terms of the A.P. is
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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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Let S denotes the sum of n terms of an A.P. whose first term is a. If the common difference d is given by d = Sn – k Sn-1 + Sn-2 then k =
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9
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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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10
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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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