在三角形ABC中角A=90度,AB=4,AC=3,M是AB上的动点,过M点作MN//BC交AC于点N以MN为直径作圆O,并在圆O内作内接矩形AMPN,令AM=X.(1)用含X的代数式表示三角形MNP的面积S(2)当X为何值时,圆O与直线BC相切
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![在三角形ABC中角A=90度,AB=4,AC=3,M是AB上的动点,过M点作MN//BC交AC于点N以MN为直径作圆O,并在圆O内作内接矩形AMPN,令AM=X.(1)用含X的代数式表示三角形MNP的面积S(2)当X为何值时,圆O与直线BC相切](/uploads/image/z/2769788-20-8.jpg?t=%E5%9C%A8%E4%B8%89%E8%A7%92%E5%BD%A2ABC%E4%B8%AD%E8%A7%92A%3D90%E5%BA%A6%2CAB%3D4%2CAC%3D3%2CM%E6%98%AFAB%E4%B8%8A%E7%9A%84%E5%8A%A8%E7%82%B9%2C%E8%BF%87M%E7%82%B9%E4%BD%9CMN%2F%2FBC%E4%BA%A4AC%E4%BA%8E%E7%82%B9N%E4%BB%A5MN%E4%B8%BA%E7%9B%B4%E5%BE%84%E4%BD%9C%E5%9C%86O%2C%E5%B9%B6%E5%9C%A8%E5%9C%86O%E5%86%85%E4%BD%9C%E5%86%85%E6%8E%A5%E7%9F%A9%E5%BD%A2AMPN%2C%E4%BB%A4AM%3DX.%EF%BC%881%EF%BC%89%E7%94%A8%E5%90%ABX%E7%9A%84%E4%BB%A3%E6%95%B0%E5%BC%8F%E8%A1%A8%E7%A4%BA%E4%B8%89%E8%A7%92%E5%BD%A2MNP%E7%9A%84%E9%9D%A2%E7%A7%AFS%EF%BC%882%EF%BC%89%E5%BD%93X%E4%B8%BA%E4%BD%95%E5%80%BC%E6%97%B6%2C%E5%9C%86O%E4%B8%8E%E7%9B%B4%E7%BA%BFBC%E7%9B%B8%E5%88%87)
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