Re: [請益] 國一下 二元一次方程式@@"
※ 引述《elevenpig (意情奔放~創意無限)》之銘言:
: ※ 引述《asdeqwp (wp)》之銘言:
另一個解法
不用這麼多層的想法
假設y=mx+n
(a,0)、(0,b)代入
0=ma+n
b= 0+n
解得 n=b
m=-b/a
所以y=(-b/a)x+b
(2,-1)代入
這樣子很快
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