x |
2x+1 |
x |
2 |
-1 |
2-1+1 |
-1 |
2 |
1 |
6 |
0 |
20+1 |
0 |
2 |
1 |
2+1 |
1 |
2 |
1 |
6 |
x |
2x+1 |
x |
2 |
1 |
2x+1 |
1 |
2 |
1 |
2x+1 |
1 |
2 |
0 |
20+1 |
0 |
2 |
1 |
2x+1 |
1 |
2 |
1 | ||
|
1 |
2 |
3 |
5 |
1 |
4+1 |
1 |
2 |
3 |
5 |
3 |
5 |
2x-x2 |
x-1 |
A.{x|x≥-1} | B.{x|x≥1} | C.{x|x≤-1} | D.{x|x≤1} |
1 |
x2+2 |
8 |
x |
A.(-∞,+∞) | B.(-∞,0) | C.(0,+∞) | D.(-∞,0)∪(0,+∞) |
4 |
2ax+a |
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