A.a≥2 | B.a≥2或a≤0 | C.a∈R | D.a≥1 |
a |
2 |
a2 |
4 |
a |
2 |
a2 |
4 |
a |
2 |
a |
2 |
a2 |
4 |
a |
2 |
a2 |
4 |
A.关于x轴对称 | B.关于直线x=1对称 |
C.关于直线x=-1对称 | D.关于Y轴对称 |
2x-k•2-x |
2x+k•2-x |
A.1 | B.-1 | C.±1 | D.0 |
ax2e|x| |
2 |
ax02ex0 |
2 |
1 |
9 |
1 |
9 |
A.a>b>c | B.c>a>b | C.c>b>a | D.a>c>b |
A.2 | B.
| C.
| D.
|
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