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if (m+1)th, (n+1)th and (r+1)th term of ...

if `(m+1)th, (n+1)th and (r+1)th` term of an AP are in GP.and m, n and r in HP. . find the ratio of first term of A.P to its common difference

A

`-n/2`

B

`-n`

C

`-2n`

D

`+n`

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The correct Answer is:
A
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VK JAISWAL-SEQUENCE AND SERIES -EXERCISE (SUBJECTIVE TYPE PROBLEMS)
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  3. The sum of all digits of n for which sum (r =1) ^(n ) r 2 ^(r ) = 2+2^...

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  11. There distinct positive numbers, a,b,c are in G.P. while log (c) a, lo...

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  13. If sum ( k =1) ^(oo) (k^(2))/(3 ^(k))=p/q, where p and q are relativel...

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  19. Let a (1), a(2), a(3),…….., a(n) be real numbers in arithmatic progres...

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