查看完整版本 : Coordinate Geometry question, too difficult to solve !!

Deer2001 2015-8-26 03:54 PM

Coordinate Geometry question, too difficult to solve !!

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14c14c 2015-8-26 09:04 PM

條parabola係呢個 y=2(x-1)^2-18
然後條線係y=-x+11
所以相交呢就 -x+11 = 2x^2 - 4x + 2 -18
0=2x^2-3x-27
0=2(x^2 - 3x/2 - 27/2)
所以個midpoint係(3/2)/2 = 3/4

Deer2001 2015-8-27 12:45 AM

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查看完整版本: Coordinate Geometry question, too difficult to solve !!