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?
-30
41
-23
-34
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1
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How many terms are there in 20, 25, 30 . . . . . . 140?
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2
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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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3
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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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4
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The 7th and 12th term of an arithmetic progression are -15 and 5 respectively. What is the 16th term?
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5
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The 3rd and 7th term of an arithmetic progression are -9 and 11 respectively. What is the 15th term?
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6
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15th term of A.P., x - 7, x - 2, x + 3, ........ is
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7
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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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8
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What is the sum of the first 13 terms of an arithmetic progression if the first term is -10 and last term is 26?
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9
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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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10
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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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