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Two sides of a triangle are y=m(1)x and ...

Two sides of a triangle are `y=m_(1)x` and `y=m_(2)x,m_(1),m_(2)` are the roots of the equation `x^(2)+ax-1=0`. For all values of a the orthocentre of the triangle lies at

A

(1,1)

B

(2,2)

C

`(3/2,3/2)`

D

(0,0)

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The correct Answer is:
D
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