b |
x |
5 |
2 |
17 |
4 |
1 |
2 |
b |
x |
|
|
1 |
2 |
1 |
2x |
1 |
2x |
1 |
2 |
1 |
2x1 |
1 |
2x2 |
x2-x1 |
2x1x2 |
(x2-x1)(1-4x1x2) |
2x1x2 |
1 |
2 |
1 |
4 |
1 |
2 |
1 |
2x |
1 |
2 |
1 |
2x |
1 |
2 |
1 |
2x |
1 |
2 |
1 |
2 |
A.m≤-3 | B.m≥-3 | C.m≤0 | D.m≥0 |
lg(2x-1) | ||
|
A.(-∞,
| B.(
| C.(-∞,
| D.[
|
1 | ||
|
1+x |
1-x |
A.f(x)=2x+b,x∈R;x=
| B.f(x)=ex,x∈R;x=cost | ||
C.f(x)=x2,x∈R;x=et | D.f(x)=|x|,x∈R;x=lnt |
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