If a + 1, 2a + 1, 4a - 1 are in A.P., then the value of a is:
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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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2
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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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3
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The two geometric means between the number 1 and 64 are
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4
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Sum of n terms of the series \(\sqrt 2 + \sqrt 8 + \sqrt {18} + \sqrt {32} + \) ....... is
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5
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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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6
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If the 7th term of a H.P. is 1/10 and the 12th term is 1/25, then the 20th term is
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7
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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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8
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The sum of first n odd natural numbers in
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9
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What is the sum of the first 13 terms of an arithmetic progression if the first term is -10 and last term is 26?
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10
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15th term of A.P., x - 7, x - 2, x + 3, ........ is
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