If an A.P. has a = 1, tn = 20 and sn = 399, then value of n is :
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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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In an A.P., if d = 4, n = 7, an = 4, then a is
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Find the first term of an AP whose 8th and 12th terms are respectively 39 and 59.
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The 2nd and 6th term of an arithmetic progression are 8 and 20 respectively. What is the 20th term?
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If four numbers in A.P. are such that their sum is 50 and the greatest number is 4 times the least, then the numbers are
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The first term of an Arithmetic Progression is 22 and the last term is 11. If the sum is 66, the number of terms in the sequence are:
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Two A.P.’s have the same common difference. The first term of one of these is 8 and that of the other is 3. The difference between their 30th terms is
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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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The 2^{nd} and 8^{th} term of an arithmetic progression are 17 and 1 respectively. What is the 14^{th} term?
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The 3rd and 8th term of an arithmetic progression are 13 and 2 respectively. What is the 14th term?
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