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If the roots of x^4 -2x^3 - 21x^2 + 2...

If the roots of` x^4 -2x^3 - 21x^2 + 22 x + 40 =0` are in A.P then the roots are

A

`2/3,-1/2 ,1,2`

B

`1,+- 2,-3`

C

`+- sqrt(3) , (3)/(4) ,-1/2`

D

`-4,-1,2,5`

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The correct Answer is:
D
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AAKASH SERIES-THEORY OF EQUATIONS-EXERCISE-III
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  6. If x^3 -3x^2 + 4=0 has a multiple root then that multiple root i...

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  7. The multiple roots of x^(4) - 2x^(3) - 11x^(2) + 12x + 36 = 0 are

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  8. If alpha, beta, gamma are the roiots of x^(3) - 10x^(2) +6x - 8 = 0 t...

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  10. If alpha ,beta and gamma are the roots of x^3-2x^2+3x-4 =0 , then fi...

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  11. If alpha , beta , gamma are the roots of x^3 +qx +r=0 then sum...

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  12. If alpha, beta, gamma are roots of x^(3) - 2x^(2) + 3x - 4 = 0, then ...

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  13. If alpha , beta , gamma are the roots of the equation x^3 +4x^...

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  14. If alpha , beta , gamma are the roots of x^3 + 2x^2 + 3x +8=0 ...

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  15. If alpha , beta , gamma are the roots of x^3 -7x + 6 =0 the ...

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  16. If alpha , beta , gamma are the roots of x^3 -3x +1=0 then the...

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  18. The equation whose roots are cubes of the roots x^3 +2x^2 +3=0...

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  19. If f(x) =x^3 +x^2 +x+1 then the coefficient of x in f(x+5) i...

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