document.write( "Question 1184288: If the focci of ellipse is $\"+x%5E2%2F9+%2B+y%5E2%2F4+=+1+\"$ subtend a right angle at some point P. Find the locus of point P? \n" ); document.write( "

Algebra.Com's Answer #814828 by ikleyn(52784) $\"\"$ $\"About$

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document.write( "The foci of the ellipse   +  = 1  are the points  (-c,0)  and  (c,0)  on  x-axis,  where c =  = .\r\n" );
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document.write( "The locus of points P such that the foci subtend the right angle at point P is the circle, \r\n" );
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document.write( "centered at the origin of the coordinate plane  and having the radius of  ,  EXCLUDING\r\n" );
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document.write( "the endpoints of its diameter that lie on x-axis.\r\n" );
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