1 |
2 |
1 |
2 |
1 |
x |
1 |
2 |
1 |
2 |
1 |
2 |
1 |
2 |
1 |
x |
log23 |
log24 |
log23 |
log28 |
log38 |
log39 |
log23 |
2 |
log23 |
3 |
3log32 |
2 |
1 |
2 |
1 |
3 |
3 |
2 |
5 |
6 |
5 |
2 |
25 |
12 |
A.a≤2 | B.a≥-2 | C.a≥2 | D.a≤-2 |
a |
x |
a |
a |
2b |
x |
c |
x2 |
a |
x |
c |
x2 |
1-x |
ax |
1 |
2 |
1 |
3 |
1 |
4 |
1 |
n |
1 |
2 |
1 |
3 |
1 |
4 |
1 |
n-1 |
x+1 |
A.(-2,+∞) | B.(-∞,1] | C.(-2,-1] | D.(-2,1) |
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