If k, 2k – 1 and 2k + 1 are three consecutive terms of an AP, the value of k is
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A boy agrees to work at the rate of one rupee on the first day, two rupees on the second day, and four rupees on third day and so on. How much will the boy get if he started working on the 1st of February and finishes on the 20th of February?
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If a + 1, 2a + 1, 4a - 1 are in A.P., then the value of a is:
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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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15th term of A.P., x - 7, x - 2, x + 3, ........ is
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If the sum of n terms of an A.P. is 3n2 + 5n then which of its terms is 164 ?
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6
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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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If 18, a, b - 3 are in A.P. then a + b =
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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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For an A.P. if a25 - a20 = 45, then d equals to:
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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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