Find the first term of an AP whose 8th and 12th terms are respectively 39 and 59.
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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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2
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For A.P. T18 - T8 = ........ ?
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3
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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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4
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The sum of the first 16 terms of an AP whose first term and third term are 5 and 15 respectively is
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5
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If a, b, c are in A.P., then (a – c)2/ (b2 – ac) =
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6
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If the 7th term of a H.P. is 1/10 and the 12th term is 1/25, then the 20th term is
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7
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The sum of first n odd natural numbers in
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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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If the sum of the series 2 + 5 + 8 + 11 … is 60100, then the number of terms are
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10
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The sum of first five multiples of 3 is:
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