考验你们智商的时候到了 一道英文数学题 同时考验你们的英文 和 A man launches his boat from point A on a bank of a straight river,1 km wide,and wants to reach point B,1 km downstream on the opposite bank,as quickly as possibl
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/30 07:46:53
![考验你们智商的时候到了 一道英文数学题 同时考验你们的英文 和 A man launches his boat from point A on a bank of a straight river,1 km wide,and wants to reach point B,1 km downstream on the opposite bank,as quickly as possibl](/uploads/image/z/7302117-21-7.jpg?t=%E8%80%83%E9%AA%8C%E4%BD%A0%E4%BB%AC%E6%99%BA%E5%95%86%E7%9A%84%E6%97%B6%E5%80%99%E5%88%B0%E4%BA%86+%E4%B8%80%E9%81%93%E8%8B%B1%E6%96%87%E6%95%B0%E5%AD%A6%E9%A2%98+%E5%90%8C%E6%97%B6%E8%80%83%E9%AA%8C%E4%BD%A0%E4%BB%AC%E7%9A%84%E8%8B%B1%E6%96%87+%E5%92%8C+A+man+launches+his+boat+from+point+A+on+a+bank+of+a+straight+river%2C1+km+wide%2Cand+wants+to+reach+point+B%2C1+km+downstream+on+the+opposite+bank%2Cas+quickly+as+possibl)
考验你们智商的时候到了 一道英文数学题 同时考验你们的英文 和 A man launches his boat from point A on a bank of a straight river,1 km wide,and wants to reach point B,1 km downstream on the opposite bank,as quickly as possibl
考验你们智商的时候到了 一道英文数学题 同时考验你们的英文 和
A man launches his boat from point A on a bank of a straight river,1 km wide,and wants to reach point B,1 km downstream on the opposite bank,as quickly as possible.He could row his boat directly across the river to point C and then run to B,or he could row directly to B,or he could row to some point D between B and C and then run to B.If he can row 6 km/h and run 8 km/h,where should he land to reach B as soon as possible?(We assume that the speed of the water is negligible compared to the speed at which the man rows.)
1 km from C
考验你们智商的时候到了 一道英文数学题 同时考验你们的英文 和 A man launches his boat from point A on a bank of a straight river,1 km wide,and wants to reach point B,1 km downstream on the opposite bank,as quickly as possibl
最快是A直接到B,时间 (根号2)/6
楼上的x已经大于1了,所求不再是最小值