Consider an infinite G.P. with first term a and common ratio r, its sum is 4 and the second term is 3/4, then
a = 7/4, r = 3/7
a = 2, r = 3/8
a = 3, r = 1/4
a = 3/2, r = ½
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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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2
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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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3
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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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4
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If the sum of p terms of an A.P. is q and the sum of q terms is p, then the sum of (p + q) terms will be
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5
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The sum of first five multiples of 3 is:
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6
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If the sum of n terms of an A.P. be 3n2 + n and its common difference is 6, then its first term is
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7
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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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8
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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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9
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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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10
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If three numbers be in G.P., then their logarithms will be in
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