The nth term of an A.P., the sum of whose n terms is Sn, is
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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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2
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If 18th and 11th term of an A.P. are in the ratio 3 : 2, then its 21st and 5th terms are in the ratio
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3
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Find the 15th term of the sequence 20, 15, 10 . . . . .
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4
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What is the sum of the first 9 terms of an arithmetic progression if the first term is 7 and last term is 55?
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5
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How many terms are there in the GP 5, 20, 80, 320........... 20480?
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6
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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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7
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If 18, a, b - 3 are in A.P. then a + b =
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8
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If S1 is the sum of an arithmetic progression of ‘n’ odd number of terms and S2 is the sum of the terms of the series in odd places, then \(\frac{{{S_1}}}{{{S_2}}}\)
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9
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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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10
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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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