maths

suse

20. y=(x-1)(1-k/2)+(2-k)*x/2 What is the slope of line?
【确定】1-k  （2）
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答案好象不对也.Y=(K-2)X+(K/2-1),则斜率=K-2

斜率＝1-k/2-k/2=1-k
只需把x前的系数拿来就可以了。

My answer is 2-k

because:: 1-k/2+(2-k)/2=2-k

suse

so the answer in 'Math题目讨论总结(02.10.14-10.20) ' is wrong.