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Let ax +by+c=0 be a given line. From po...

Let `ax +by+c=0` be a given line. From points on this line tangents are drawn to `x^(2)+y^(2)=r^(2)`. Then the chord of contact of tangents passes through a point .............

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The correct Answer is:
`(-(ar^(2))/(c )-(b r^(2))/(c ))`
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