题目
题型:不详难度:来源:
①x2+y2=1
②|x-1|+
y2-1 |
③
x-1 |
y- |
④y=
x-2 |
1-x |
A.① | B.② | C.③ | D.④ |
答案
1-x2 |
②由|x-1|+
y2-1 |
y2-1 |
③由
x-1 |
y- |
x-1 |
④要使函数y=
x-2 |
1-x |
|
|
故选C.
核心考点
举一反三
①f(x)=π(x-1)2-1;②f(x)=20101-x;③f(x)=ln(x+1);④f(x)=sin
πx |
2 |
A.①③ | B.②③ | C.①④ | D.②④ |
表1 市场供给量
y2-1 |
x-1 |
y- |
x-2 |
1-x |
A.① | B.② | C.③ | D.④ |
1-x2 |
y2-1 |
y2-1 |
x-1 |
y- |
x-1 |
x-2 |
1-x |
|
|
πx |
2 |
A.①③ | B.②③ | C.①④ | D.②④ |