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The locus of the point of intersection o...

The locus of the point of intersection of the tangents at the extremities of a chord of the circle ` x^(2) + y^(2) = a^(2)` which touches the circles ` x^(2) + y^(2) = 2ax` is

A

`y^(2) = a ( a - 2x)`

B

` x^(2) = a( a - 2y)`

C

` x^(2) + y^(2) = ( y + a)^(2) `

D

None of these

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The correct Answer is:
A
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