If k, 2k – 1 and 2k + 1 are three consecutive terms of an AP, the value of k is
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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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If 18, a, b  3 are in A.P. then a + b =
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A square is drawn by joining the mid points of the sides of a given square in the same way and this process continues indefinitely. If a side of the first square is 4 cm, determine the sum of the areas all the square.
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If the sum of three consecutive terms of an increasing A.P. is 51 and the product of the first and third of these terms is 273, then the third term is :
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If a, b, c are in A.P., then (a – c)^{2}/ (b^{2} – ac) =
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If four numbers in A.P. are such that their sum is 50 and the greatest number is 4 times the least, then the numbers are
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A bacteria gives birth to two new bacteria in each second and the life span of each bacteria is 5 seconds. The process of the reproduction is continuous until the death of the bacteria. initially there is one newly born bacteria at time t = 0, the find the total number of live bacteria just after 10 seconds :
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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 16 terms of an AP whose first term and third term are 5 and 15 respectively is
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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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