For an A.P. if a25 - a20 = 45, then d equals to:
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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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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 nth term of an A.P. is 2n + 1, then the sum of first n terms of the A.P. 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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If the fifth term of a GP is 81 and first term is 16, what will be the 4th term of the GP?
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In an A.P., if d = -4, n = 7, an = 4, then a is
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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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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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If log 2, log (2x -1) and log (2x + 3) are in A.P, then x is equal to ___
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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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