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Let 2x^2 +y^2-3xy = 0 be the equation of...

Let `2x^2 +y^2-3xy = 0` be the equation of a pair of tangents drawn from the origin `O` to a circle of radius `3` with centre in the first quadrant. If `A` is one of the points of contact, then the length of `OA` is

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The correct Answer is:
`3 ( 3 + sqrt( 10))`
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