Find the first term of an AP whose 8th and 12th terms are respectively 39 and 59.
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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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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 number of terms of the A.P. 3, 7, 11, 15, ....... to be taken so that the sum is 406 is
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4
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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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5
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Find the nth term of the following sequence :
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6
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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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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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If Sn denote the sum of the first n terms of an A.P. If S2n = 3Sn , then S3n : Sn is equal to
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9
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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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10
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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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