x2-3x+3 |
x-2 |
x2-3x+3 |
x-2 |
(x-2)2+(x-2)+1 |
x-2 |
1 |
x-2 |
1 |
x-2 |
(x-2)⋅
|
3 |
3 |
3 |
A.∃x∈R,ex<x | B.∀x∈R,ex<x | C.∀x∈R,ex≤x | D.∃x∈R,ex≤x |
A.若b2=ac,则a,b,c成等比数列 | ||||||||||||||||
B.∃x∈R,使得sinx+cosx=
| ||||||||||||||||
C.若向量
| ||||||||||||||||
D.若a<b,则
|
1 |
x |
A.∀x∈R+,x+
| B.∀x∈R+,x+
| ||||
C.∃x1∈R+,x+
| D.∃x1∈R+,x+
|
A.P:∃x∈R,x≤sinx | B.P:∀x∈R,x≤sinx |
C.P:∃x∈R,x<sinx | D.P:∀x∈R,x<sinx |
A.∃x0∈R,使log2x0>0成立 |
B.∃x0∈R,使log2x0≥0成立 |
C.∀x0∈R,均有log2x0≥0成立 |
D.∀x0∈R,均有log2x0>0成立 |
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