1-x |
1+x |
x1+x2 |
1+x1x2 |
A.0 | B.1 | C.2 | D.3 |
1-x |
1+x |
1+x |
1-x |
1-x |
1+x |
1+x |
1-x |
1-x |
1+x |
1-x |
1+x |
2 |
1+x |
2 |
1+x |
1-x1 |
1+x1 |
1-x2 |
1+x2 |
1-x1 |
1+x1 |
1-x2 |
1+x2 |
1+x1x2-x1-x2 |
1+x1x2+x1+x2 |
x1+x2 |
1+x1x2 |
1-
| ||
1+
|
1+x1x2-x1-x2 |
1+x1x2+x1+x2 |
1 |
a |
1 |
b |
1 |
x-1 |
x2 |
4 |
y2 |
3 |
x2 |
4 |
y2 |
2 |
π |
4 |
π |
3 |
π |
6 |
π |
4 |
π |
2 |
π |
2 |
8-m |
an |
A.函数y=cotx在其定义域内是减函数 | ||
B.函数y=|sin(2x+
| ||
C.函数y=cosx在每个区间[2kπ+π,2kπ+
| ||
D.函数y=tan(x+
|
A.①② | B.②③ | C.②④ | D.③④ |
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