3 |
2 |
A.-2 | B.-1 | C.0 | D.1 |
3 |
2 |
3 |
2 |
3 |
2 |
1 |
2 |
x-y |
1-xy |
1 |
2 |
2xn | ||
1+
|
1 |
f(xn) |
m-4 |
3 |
A.增函数且最小值是-1 | B.增函数且最大值是-1 |
C.减函数且最小值是-1 | D.减函数且最大值是-1 |
x+2 |
a-x |
A.f(cosα)>f(cosβ) | B.f(sinα)>f(cosβ) |
C.f(sinα)>f(sinβ) | D.f(cosα)>f(sinβ) |
1 |
x |
x2+1 |
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