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If (a^(n)+b^(n))/(a^(n-1)+b^(n-1)) is an...

If `(a^(n)+b^(n))/(a^(n-1)+b^(n-1))` is an G.M between `a` and `b` then the value of `n` is

A

0

B

1

C

-1

D

none of these

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The correct Answer is:
B
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HIMALAYA PUBLICATION-PROGRESSIONS-QUESTION BANK
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  9. If A=1+r^(a)+r^(2 a)+r^(3 a)+.. . to oo and lebrge B=1+r^(b)+r^(2 b)+....

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  10. The determinant : |(a,b,aalpha+b),(b,c,balpha+c),(aalpha+b,balpha+c,...

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  11. If a,b,c are in G.P.L, then the equations ax^(2) + 2bx + c = 0 0 and d...

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  16. The sum of three numbers in A.P. is 27 and the sum of their squares is...

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  17. If a,b,c,d and p are distinct non -zero real numbers such that : ( a...

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  18. If A.M of two numbers is twice their G.M, then the ratio of the greate...

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  19. If S(n) = nP + (n (n - 1))/(2) Q where Sn denotes the sum of the first...

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  20. The first and last elements of an A.P are a and l respectively. If S i...

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