f(x2)-f(x1) |
x2-x1 |
1 |
2 |
A.a<b<c | B.c<b<a | C.b<c<a | D.b<a<c |
f(x2)-f(x1) |
x2-x1 |
1 |
2 |
5 |
2 |
5 |
2 |
5 |
2 |
a |
b |
a |
b |
3 |
π |
6 |
1+x |
1-x |
x1+x2 |
1+x1x2 |
a+b |
1+ab |
1 |
2 |
1-x |
x-1 |
A.奇函数 | B.偶函数 |
C.既是奇函数又是偶函数 | D.非奇非偶函数 |
A.{x|-1<x<3} | B.{x|x<-2或x>2} | C.{x|x>2} | D.{x|x>3} |
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