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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1
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The nth term of an A.P., the sum of whose n terms is Sn, is
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The 3^{rd} and 7^{th} term of an arithmetic progression are 9 and 11 respectively. What is the 15^{th} term?
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3
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What is the sum of the first 12 terms of an arithmetic progression if the first term is 19 and last term is 36?
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4
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The sum of the first and third term of an arithmetic progression is 12 and the product of first and second term is 24, then first term is
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5
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The 7th and 12th term of an arithmetic progression are 15 and 5 respectively. What is the 16th term?
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6
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The sum of first five multiples of 3 is:
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7
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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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8
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How many terms are there in 20, 25, 30 . . . . . . 140?
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9
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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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10
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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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