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If ` alpha , beta , gamma ` are the roots of ` x^3 + px^2+qx -r=0` then ` alpha^2 + beta^2 + gamma^2 =`

A

`p^2 -2q`

B

`p^3 -3pq +3r`

C

`p^4 -3p^2 q +2q^2 `

D

`2q`

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The correct Answer is:
A
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AAKASH SERIES-THEORY OF EQUATIONS-EXERCISE-I
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  8. The equation whose roots are multiplied by 3 of those of 2x^(3) - 3x^...

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  10. The equation whose roots are those of equation x^4 - 3x^3 +5x...

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

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  15. Each of the roots of the equation x^(3) - 6x^(2) + 6x - 5 = 0 are incr...

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  17. If 1, -2, 3 are the roots of ax^(3) + bx^(2) + cx + d = 0 then the roo...

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  18. IF the roots of ax^3 +bx^2 +cx +d =0 are in G.P then the roots...

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  19. If 1,3,4,0 are the roots of ax^4 +bx^3 +cx^2 +dx +e =0 then the...

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