如图,线段AB=24,动点P从A出发,以每秒2个单位的速度沿射线AB运动,M为AP的中点(1)出发多少秒后,PB=2AM?_a____m___p_____b_(2)当P在线段AB上运动时,试说明2BM-BP为定值.(3)当P在AB延长线上运动时,N为BP
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![如图,线段AB=24,动点P从A出发,以每秒2个单位的速度沿射线AB运动,M为AP的中点(1)出发多少秒后,PB=2AM?_a____m___p_____b_(2)当P在线段AB上运动时,试说明2BM-BP为定值.(3)当P在AB延长线上运动时,N为BP](/uploads/image/z/1500601-49-1.jpg?t=%E5%A6%82%E5%9B%BE%2C%E7%BA%BF%E6%AE%B5AB%3D24%2C%E5%8A%A8%E7%82%B9P%E4%BB%8EA%E5%87%BA%E5%8F%91%2C%E4%BB%A5%E6%AF%8F%E7%A7%922%E4%B8%AA%E5%8D%95%E4%BD%8D%E7%9A%84%E9%80%9F%E5%BA%A6%E6%B2%BF%E5%B0%84%E7%BA%BFAB%E8%BF%90%E5%8A%A8%2CM%E4%B8%BAAP%E7%9A%84%E4%B8%AD%E7%82%B9%281%29%E5%87%BA%E5%8F%91%E5%A4%9A%E5%B0%91%E7%A7%92%E5%90%8E%2CPB%3D2AM%3F_a____m___p_____b_%EF%BC%882%EF%BC%89%E5%BD%93P%E5%9C%A8%E7%BA%BF%E6%AE%B5AB%E4%B8%8A%E8%BF%90%E5%8A%A8%E6%97%B6%2C%E8%AF%95%E8%AF%B4%E6%98%8E2BM-BP%E4%B8%BA%E5%AE%9A%E5%80%BC.%EF%BC%883%EF%BC%89%E5%BD%93P%E5%9C%A8AB%E5%BB%B6%E9%95%BF%E7%BA%BF%E4%B8%8A%E8%BF%90%E5%8A%A8%E6%97%B6%2CN%E4%B8%BABP)
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