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If alpha , beta , gamma are the ro...

If ` alpha , beta , gamma ` are the roots of `x^3 +qx +r=0` then ` sum ( beta + gamma )^(-1)`=

A

`(q)/(r )`

B

`(r )/(q)`

C

`-(q)/( r)`

D

`-r/q`

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The correct Answer is:
A
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AAKASH SERIES-THEORY OF EQUATIONS-EXERCISE-III
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