如图,P为x轴的正半轴上任意一点,PB垂直于x轴,分别交直线y=0.5x、y=kx于A,B两点,BC⊥PB交直线y=0.5x于点C,CD⊥BC交直线y=kx于点D.(1)求线段PA与PB的比值(用含k的代数式表示).(2)如果点D在函数y=
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![如图,P为x轴的正半轴上任意一点,PB垂直于x轴,分别交直线y=0.5x、y=kx于A,B两点,BC⊥PB交直线y=0.5x于点C,CD⊥BC交直线y=kx于点D.(1)求线段PA与PB的比值(用含k的代数式表示).(2)如果点D在函数y=](/uploads/image/z/15070724-44-4.jpg?t=%E5%A6%82%E5%9B%BE%2CP%E4%B8%BAx%E8%BD%B4%E7%9A%84%E6%AD%A3%E5%8D%8A%E8%BD%B4%E4%B8%8A%E4%BB%BB%E6%84%8F%E4%B8%80%E7%82%B9%2CPB%E5%9E%82%E7%9B%B4%E4%BA%8Ex%E8%BD%B4%2C%E5%88%86%E5%88%AB%E4%BA%A4%E7%9B%B4%E7%BA%BFy%3D0.5x%E3%80%81y%3Dkx%E4%BA%8EA%2CB%E4%B8%A4%E7%82%B9%2CBC%E2%8A%A5PB%E4%BA%A4%E7%9B%B4%E7%BA%BFy%3D0.5x%E4%BA%8E%E7%82%B9C%2CCD%E2%8A%A5BC%E4%BA%A4%E7%9B%B4%E7%BA%BFy%3Dkx%E4%BA%8E%E7%82%B9D.%EF%BC%881%EF%BC%89%E6%B1%82%E7%BA%BF%E6%AE%B5PA%E4%B8%8EPB%E7%9A%84%E6%AF%94%E5%80%BC%EF%BC%88%E7%94%A8%E5%90%ABk%E7%9A%84%E4%BB%A3%E6%95%B0%E5%BC%8F%E8%A1%A8%E7%A4%BA%EF%BC%89.%EF%BC%882%EF%BC%89%E5%A6%82%E6%9E%9C%E7%82%B9D%E5%9C%A8%E5%87%BD%E6%95%B0y%3D)
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