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The harmonic mean of the roots of th...

The harmonic mean of the roots of the equation ` ( 5+ sqrt(2)) x^2 -(4+sqrt(5)) x+(8+ 2 sqrt(5))`=0 is

A

2

B

4

C

6

D

8

Text Solution

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The correct Answer is:
B
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DIPTI PUBLICATION ( AP EAMET)-QUADRATIC EXPRESSIONS-EXERCISE 1A (QUADRATIC EQUATIONS)
  1. alpha , beta are the roots of x^2+kx+2=0 . If alpha - beta =1 ...

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  2. alpha , beta are roots of the equation lamda (x^2-x)+x+5=0 If ...

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  3. The harmonic mean of the roots of the equation ( 5+ sqrt(2)) x^...

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  4. IF C and D are the roots of (x-a) (x-b) -k=0 then the roots of ...

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  5. IF alpha , beta be the roots of the equation (x-a) ( x-b) +c=0 ...

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  6. The equation whose roots are 2 sqrt(3) - 5 and -2 sqrt(3)-5 is

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  7. The equation whose roots are 3+ 2 I , 3- 2i is

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  8. IF alpha and beta are the roots of 2x^2 + x + 3=0 , then the ...

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  9. IF alpha , beta are the roots of x^2 + 5x - 4 =0 then the...

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  10. If alpha, beta are the roots of x^(2) - x + 1 = 0 then the quadratic e...

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  11. IF alpha , beta are the roots of x^2 - ax +b=0 , then the who...

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  12. IF alpha , beta are the roots of ax^2 + bx +c=0 then the equatio...

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  13. IF alpha , beta are the roots of the equation ax^2+ bx +c=0the...

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  14. In a Delta ABC, the value of angle A is obtained from the eq...

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  15. The equation whose roots are the cubes of the roots of the eq...

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  16. IF alpha , beta are the roots of ax ^2+bx + c=0 and gamma , delt...

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  17. IF a = cos ( (2 pi ) /(7)) + isin ((2pi)/(7)) , alpha = a + a^2+a^...

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  18. Let alpha!=beta satisfy alpha^(2)+1=6alpha,beta^(2)+1=6beta. Then, the...

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  19. IF 3p^2 =5p+2 and 3q^2=5q+2 where p ne q then the equation whose ...

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  20. IF alpha , beta are the roots of the equation x^2+2ax +b=0 , the...

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