x |
x-1 |
x1 |
x1-1 |
x2 |
x2-1 |
x1 |
x1-1 |
x2 |
x2-1 |
x2-x1 |
(x1-1)(x2-1) |
4 |
3 |
4 |
3 |
A.奇函数,在(-∞,+∞)上单调递增 |
B.奇函数,在(-∞,+∞)上单调递减 |
C.偶函数,在(-∞,+∞)上单调递增 |
D.偶函数,在(-∞,+∞)上单调递减 |
3-2x-x 2 |
A.(-∞,-1) | B.(-1,+∞) | C.(-3,-1) | D.(-1,1) |
1 |
1-x(1-x) |
A.
| B.
| C.
| D.
|
|
A.最大值为3,最小值-1 | ||
B.最大值为7-2
| ||
C.最大值为3,无最小值 | ||
D.既无最大值为,也无最小值 |
|
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