2x |
4x+1 |
2x1 |
4x1+1 |
2x2 |
4x2+1 |
2x1(4x2+1)-2x2(4x1+1) |
(4x1+1)(4x2+1) |
2x14x2+2x1-2x24x1-2x2 |
(4x1+1)(4x2+1) |
2x1+2x2 +2x1-2x2+2x1 -2x2 |
(4x1+1)(4x2+1) |
(2x1+x2 -1)(2x2 -2x1) |
(4x1+1)(4x2+1) |
(2x1+x2 -1)(2x2 -2x1) |
(4x1+1)(4x2+1) |
2-x |
4-x+1 |
2x |
4x+1 |
2x |
4x+1 |
|
|
4 |
3 |
4 |
3 |
A.-2 | B.-1 | C.1 | D.2 |
a |
a2-1 |
A.增函数 | B.减函数 |
C.先减后增的函数 | D.先增后减的函数 |
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