x2+1) |
A.-2 | B.-1 | C.0 | D.2 |
x2+1 |
(-x)2+1 |
a |
x+1 |
A.(-1,0)∪(0,1) | B.(-1,0)∪(0,1] | C.(0,1] | D.(0,1) |
|
A.(1,+∞) | B.[4,8) | C.(4,8) | D.(1,8) |
A..[1,+∞) | B..(2,+∞) | C..(-∞,1] | D.(-∞,0) |
A.f(x)=-x2+x+1 | B.f(x)=
| C.f(x)=log
| D.f(x)=lnx |
4 |
x |
A.5 | B.
| C.
| D.4 |
© 2017-2019 超级试练试题库,All Rights Reserved.