Applications-differentiation2
2010-11-22 8:20 am
圖片參考：http://imgcld.yimg.com/8/n/HA00265776/o/701011220156313873413840.jpg
Car A travels due north at 1/2 km/min and car B travels along the northeast direction at √2 km/min. At noon, car B will start at O and car A will start at a position 5 km due north of O. (a) When will the two cars be closest to each other? (b) Find the shortest distance between the two cars.
回答 (1)
2010-11-22 9:10 am
✔ 最佳答案
圖片參考：http://imgcld.yimg.com/8/n/HA00430051/o/701011220156313873413850.jpg
(a) When t = 2, AB is minimum.
So at 12:02 pm, the distance between two cars is minimum.
(b) Shortest distance = root20
= 2root5 km
參考: me
收錄日期: 2021-04-13 17:40:06
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20101122000051KK01563