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If `a,a_(1),a_(2),a_(3),"......",a_(2n)`b are in AP and `a,b_(1),b_(2),b_(3),"......",b_(2n)`b are in GP and h is the HM of a and b, then `(a_(1)+a_(2n))/(b_(1)b_(2n))+(a_(2)+a_(2n-1))/(b_(2)b_(2n-1))+"...."+(a_(n)+a_(n+1))/(b_(n)b_(n+1))` is equal to

A

2nh

B

`n/h`

C

nh

D

`(2n)/h`.

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MODERN PUBLICATION-SEQUENCES AND SERIES-EXERCISE
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  3. If a,a(1),a(2),a(3),"......",a(2n)b are in AP and a,b(1),b(2),b(3),".....

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  4. The sum of the products of the ten numbers pm1,pm2,pm3,pm4,pm5 takung ...

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  5. Find the value of the expression sum(i=1)^(n)sum(j=1)^(i)sum(k=1)^(j)1...

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  6. If x is a positive number different from 1, such that logax,logbx and ...

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  7. For what value of m, (a^(m+1)+b^(m+1))/(a^m+b^m) is the arithmetic mea...

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  8. If a, b, c are in G.P. and x, y are arithmetic mean of a, b and b, c r...

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  9. A student read common difference of an A.P. as -3 instead of 3 and obt...

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  10. If a1=1 and an =na(n-1), for all positive integers n ge 2, then a5 is ...

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  11. If a1, a2, ............, an are in A.P.with common difference d ne 0, ...

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  12. The arithmetic mean of first n odd natural numbers is :

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  13. In a sequence of 21 terms the first 11 terms are in A.P. with common d...

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  14. If the sum to 2n terms of the A.P. 2, 5, 8, 11, .... is equal to the s...

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  15. The third term of a GP is 3. What is the product of the first five ter...

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  16. If the sum of the first two terms and the sum of the first four terms ...

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  17. If n> 1 and log2 x,log3 x, logx 16, are in G.P., then what is x equal ...

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  18. In a geometric progression with first term a and common ratio r, what ...

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