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Let `a_(1), a_(2), a_(3)`….. be terms of an A.P. If `(a_(1) + a_(2) + …..a_(p))/(a_(1) + a_(2) + …..a_(q)) = (p^(2))/(q^(2)) (p ne q)` then `(a_(6))/(a_(21))=`

A

`(7)/(2)`

B

`(2)/(7)`

C

`(11)/(41)`

D

`(41)/(11)`

Text Solution

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The correct Answer is:
C
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AAKASH SERIES-SEQUENCE AND SERIES-Practice Exercise
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  5. The ratio between the sum of n terms of two A.P.'s is 3n+8: 7n+15. The...

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  6. The sum of all integers between 50 and 500 which are divisible by 7 is

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  9. The sum of r terms of an A.P. is denoted by S(r ) and (S(m+1))/(S(n+1)...

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  10. The n^(th) term of an A.P is p and the sum of the first n terms is s. ...

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  11. If s(1), s(2), s(3)…..s(p) are the sums of n terms of 'p' A.P's whose ...

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  12. If a(1), a(2), a(3)…..a(n) are in A.P. with common difference d then s...

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  13. If S(1), S(2), S(3) be the sum of 10, 20, 30 terms respectively of an ...

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  14. The first, second and last terms of an A.P. are a, b, c respectively, ...

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  15. If the sum of the first ten terms of an A.P is four times the sum of i...

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  16. If a,b,c are in A.P then a((1)/(b) + (1)/(c )), b ((1)/(c ) + (1)/(a))...

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  18. If the A.M. between p^(th) and q^(th) terms of an A.P be equal to A.M ...

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  19. If n A.M's are inserted between two quantites a and b then their sum i...

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  20. If n A.M.'s are inserted between 4 and 96 then sum of n A.M.'s is

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