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Find the condition for the chord lx + my...

Find the condition for the chord lx + my=1 of the circle `x^(2)+y^(2)=a^(2)` to subtend a right angle at the origin.

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VGS PUBLICATION-BRILLIANT-MOST IMPORTANT QUESTIONS-PAIR OF STRAIGHT LINES (LONG ANSWER TYPE QUESTIONS)
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  7. If ax^2+2hxy+by^2+2gx+2fy+c=0 represents two parallel lines then prove...

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  8. If ax^2+2hxy+by^2+2gx+2fy+c=0 represents two parallel lines then prove...

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  9. If ax^2+2hxy+by^2+2gx+2fy+c=0 represents two parallel lines then prove...

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  10. S.T the equation 2x^2-13xy-7y^2+x+23y-6=0 represents a pair of straigh...

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  12. Show that the lines joining the origin to the points of intersection o...

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  13. Show that the lines joining the origin with the points of intersection...

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  14. Find the value if k , if the lines joining the origin with the points ...

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  16. Find the condition for the chord lx + my=1 of the circle x^(2)+y^(2)=a...

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