1 |
5 |
4x |
π-3 |
x2-y2 |
2 |
1 |
x |
5x2 |
x |
A.2 | B.3 | C.4 | D.5 |
1 |
x |
5x2 |
x |
2 |
2 |
1 |
3 |
x |
π-3 |
5 |
a-x |
x(x+y) |
x |
x+3 |
(x+1)(x-2) |
A.2个 | B.3个 | C.4个 | D.5个 |
x-b |
x+a |
2x-b |
3x+a |
x2-1 |
x-1 |
A.x≠1 | B.x=-1 | C.x≠-3 | D.x=±1 |
x-2 |
x2-1 |
A.1 | B.-1 | C.±1 | D.2 |
2 |
x-1 |
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