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CHHAYA PUBLICATION-SEQUENCE AND SERIES-Exercise 9 B (Short Answer Type Questions)
- How many even numbers are there between 91 and 259 ? Find also the sum...
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- Find the sum of all the multiples of 11 between 100 and 400.
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- Find the sum of all the numbers of the form n^(3) lying between 100 an...
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- The nth term of an A.P. is 7n-5, find the sum of first 20 terms of the...
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- The middle term of an arithmetic progression having (2n+1) terms is m,...
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- The sum of three integers in A.P. is 15 and their product is 80, find ...
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- The sum of four integers in A.P. is 20 and the sum of their squares is...
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- Divide 21 into three parts in A.P. such that the product of the first ...
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- The ratio of the 11th and 14th terms of an A.P. is 7:9, find the ratio...
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- Insert five arithmetic means between (-19) and 23.
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- There are n arithmetic means between 4 and 31 such that the second mea...
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- If a, b, c are In A.P., then show that, (a+2b-c) (2b+c-a)(c+a-b) = 4...
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- If a, b, c are In A.P., then show that, a^(2)(b+c), b^(2)(c+a), c^(2...
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- If a, b, c are In A.P., then show that, (1)/(b c), (1)/(c a), (1)/(a...
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- If the pth , qth and rth terms of an A.P. be P, Q and R respectively t...
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- If (b+c)/(a), (c+a)/(b), (a+b)/(c ) are in A.P. show that (1)/(a), (1)...
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- Let a(a != 0) is a fixed real number and (a-x)/(p x) = (a-y)/(qy) = (a...
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- If a+c = 2b and ab + cd + ad = 3bc, prove that the four numbers a, b, ...
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- Find the least value of n for which the sum of the series 20 + 28 + 36...
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- The nth term of a series in A.P. is an + b. Find the sum of the series...
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