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If a,b,c are in G.P and A.M of a and b i...

If a,b,c are in G.P and A.M of a and b is x and A.M. of b and c is y then…….

A

`(1)/(x) + (1)/(y) =2`

B

`(1)/(x) + (1)/(y) = (1)/(2)`

C

`(1)/(x) + (1)/(y) = (2)/(a)`

D

`(1)/(x) + (1)/(y) = (2)/(b)`

Text Solution

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The correct Answer is:
D
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KUMAR PRAKASHAN-SEQUENCE AND SERIES-Textbook based MCQs
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  2. The p^(th), q^(th) and r^(th) terms of an A.P. are in geometric progre...

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  3. If a,b,c are in G.P and A.M of a and b is x and A.M. of b and c is y t...

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  4. If 10^(th) and 4^(th) terms of a G.P are 9 and 4 respectively, then it...

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  5. If A be one A.M and p, q be two G.M.'s between two numbers then 2A is ...

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  6. If m^(th), n^(th) and p^(th) terms of an A.P and G.P be equal and be r...

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  7. The A.M of two positive number is x and two G.M.'s between them are y ...

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  8. Series (1)/(log(2)^(2)) + (1)/(log(4)^(4)) + (1)/(log(8)^(4)) + …..+ (...

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  9. If Sigma n = 210 " then " Sigma n^(2)=…….

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  10. sqrt2 + sqrt8 + sqrt18 + sqrt32 +…..up to n terms is…….

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  11. 1^(2) + 3^(2) + 5^(2)+……..up to n terms is……..

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  12. If S(n)=1 + (1)/(2) + (1)/(2) + …..+ (1)/(2^(n-1)), (n in N) then …….

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  13. 0 lt theta lt (pi)/(2) then the minimum value of sin^(3) theta + cosec...

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  14. If a,b,c,d,e,f are in A.P. then d-b= ……

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  15. underset(r=1)overset(n)Sigma (underset(m=1)overset(r )Sigma m)=……

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  16. If 25, x - 6 and x - 12 are in G.P then x = .......... or ......... .

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  17. If 2,b,c, 23 are in G.P then (b-c)^(2)+ (c-2)^(2) + (23-b)^(2)= …….

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  18. If a + b + c = 5 then the maximum value of ab^(3)c is……

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  19. Three numbers a,b, c are between 2 and 18 such that a + b+ c= 25. If 2...

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  20. A G.P has 2n terms. Its first term is a and last term is l then the pr...

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