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Topic: locus
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Posts: 16
Registered: 4/30/07
Posted: Jul 4, 2007 6:00 AM
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The line y=mx+c meets the lines ax^2+2hxy+by^2 = 0 at A and B and the lines through A and B perpendicular to OA and OB respectively meet at P. Show that, as c varied, the locus of P is the line (a-b)(x-my)+ 2h(mx+y) = 0

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