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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1
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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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2
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The sum of first five multiples of 3 is:
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3
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15th term of A.P., x - 7, x - 2, x + 3, ........ is
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4
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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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5
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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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6
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Find the nth term of the following sequence :
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7
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Which term of the A.P. 92, 88, 84, 80, ...... is 0?
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8
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The 3rd and 9th term of an arithmetic progression are -8 and 10 respectively. What is the 16th term?
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9
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How many 2-digit positive integers are divisible by 4 or 9?
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10
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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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