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[" 15.Three distinct points "P(3u^(2),2u...

[" 15.Three distinct points "P(3u^(2),2u^(3));Q(3v^(2),2v^(3))" and "],[R(3w^(2),2w^(3))" are collinear,then: "],[[" (a) "uv+vw+wu=0," (b) "uv+vw+wu=3],[" (c) "uv+vw+wu=2," (d) "uv+ww+wu=1]]

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