If a, b, c are in A.P., then (a – c)2/ (b2 – ac) =
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After striking the floor, a rubber ball rebounds to 4/5th of the height from which it has fallen. Find the total distance that it travels before coming to rest if it has been gently dropped from a height of 120 metres.
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The 4th and 7th term of an arithmetic progression are 11 and -4 respectively. What is the 15th term?
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Find the 15th term of the sequence 20, 15, 10 . . . . .
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The 2nd and 8th term of an arithmetic progression are 17 and -1 respectively. What is the 14th term?
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In an A.P., if d = -4, n = 7, an = 4, then a is
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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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15th term of A.P., x - 7, x - 2, x + 3, ........ is
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The 7th and 21st terms of an AP are 6 and -22 respectively. Find the 26th term
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Which term of the A.P. 92, 88, 84, 80, ...... is 0?
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If an A.P. has a = 1, tn = 20 and sn = 399, then value of n is :
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