作者Samuelson (深思考)
看板GRE_Verbal
標題[計量] 問題請教
時間Sun Apr 27 19:44:39 2008
一題計量問題請教版友
題目是來欣發的資料 Q2-3文字應用題的第11題
Right triangle PQR is to be constructed in the xy-plane so that the right
angle is at P and PR is parallel to the x-axis. The x- and y-coordinates of P
Q, and R are to be integers that satisfy the inequalities -4< = x < =16 and
6< = y < =16. How many different triangles with these properties could be
constructed?
< = 是小於等於的意思..不好意思
Ans: 9,900
看了幾遍都解不出來 懇請高手幫助
謝謝!!
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◆ From: 59.112.10.127
1F：→ Samuelson:抱歉! 應該是-4<= X <=5 59.112.10.127 04/27 19:45
2F：推 M104:11取2 乘上 10取2 乘上4 應該是這樣吧 218.168.201.39 04/27 20:04