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Let alpha and beta be the roots of...

Let `alpha and beta ` be the roots of equation `x^2-6x -2=0`. If ` a_n=alpha ^n - beta ^n , ` for `n ge 1` then the value of `(a_10-2a_s)/(2a_9)` is equal to

A

6

B

`-6`

C

`3`

D

`-3`

Text Solution

Verified by Experts

The correct Answer is:
C
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DIPTI PUBLICATION ( AP EAMET)-QUADRATIC EXPRESSIONS-EXERCISE 1A (QUADRATIC EQUATIONS)
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  3. Let alpha and beta be the roots of equation x^2-6x -2=0. If a...

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  7. If alpha , beta are the roots of x^2+ax -b=0 and gamma , sig...

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  8. If alpha , beta are the roots of x^2 +px -q=0 and gamma , de...

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  9. If alpha , beta are the roots of x^2 + px +1=0 and gamma , d...

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  12. The ratio of the roots of the equation ax ^2 + bx +c=0 is same ...

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  13. alpha , beta are the roots of ax ^2+bx +c=0 and gamma , sigma...

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  14. Let p and q be the roots of x^2 - 2x + A =0 and let r and s b...

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  15. Let x1 , x2 , be the roots of the equation x^2 - 3x +p=0 an...

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  16. Let alpha , beta be the roots of x^2 - x +p=0 and gamma , ...

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  17. x1 and x3 are the roots of the equation Ax ^2 - 4x +1=0 and x2...

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  18. The coefficient of x in a quadratic equation x^2 + px +q=0 was ...

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  19. The students while solving a quadratic equation in x, one copi...

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  20. If 8 and 2 are the roots of x^2 + ax + beta = 0 and 3,3 are...

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