標題: 中4 maths 神手快d入 [打印本頁] 作者: 承b 時間: 14-2-2012 20:02 標題: 中4 maths 神手快d入 suppose P(a,b) is a point on the straight line x-y+1=0 such that the sum of the distance between P and the point A(1,0) and distance between P and the point B(3,0) is the least,find the value of a+b.
唔係幾明e條,最好可以解得易明d作者: [H]bunbunbunbun 時間: 15-2-2012 11:40
P is on the line: x-y+1=0 (y=x+1)
A=(1,0), B=(3,0)
find the coordinates of P such that the distance AP+BP is minimum作者: 承b 時間: 15-2-2012 17:17
咁姐係點找作者: 承b 時間: 18-2-2012 09:44
冇人理我= =作者: 火中有火 時間: 18-2-2012 21:50 本帖最後由 火中有火 於 19-2-2012 01:47 編輯