2+x |
2-x |
2+x |
2-x |
x+2 |
x-2 |
2+x |
2-x |
x+2 |
x-2 |
|
|
2+x |
2-x |
-(2-x)+4 |
2-x |
4 |
2-x |
| ||
2 |
2 |
A.(-∞,1] | B.[-1,
| C.[0,
| D.(1,2) |
A.(
| B.(10a,1-b) | C.(
| D.(a2,2b) |
A.若M=N,则logaM=logaN |
B.若logaM=logaN,则M=N |
C.若logaM2=logaN2,则M=N |
D.若M=N,则logaM2=logaN2 |
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