|PD|=4+k 设△ABD的面积为S,则184k+3S=AB|?|PD|=, 24+k所以S324k+3+134k+3?324k+3 ?13k+3=161...
4y=5x,故x:y=4:5;因此当P点第一次与B点重合前相碰7次,那么AB:AD=4:5.解答:解:(1)5;(2)24;解题思路示意图:2010北京中考数学...
year-old boy or anyone for that matter wants to hear: "Mike, there's a probl...
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