6 |
5-x |
A.{2,3} | B.{1,2,3,4} | C.{1,2,3,6} | D.{-1,2,3,4} |
6 |
5-x |
6 |
5-4 |
6 |
5-3 |
6 |
5-2 |
6 |
4 |
3 |
2 |
6 |
5 |
6 |
6 |
6 |
6-(-1) |
6 |
7 |
6 |
5-x |
A.4 | B.5 | C.19 | D.20 |
A.{x|x2+3=3} | B.{(x,y)|y=-x2,x,y∈R} |
C.{x|-x2≥0} | D.{x|x2-x+1=0,x∈R} |
A.1 | B.2 | C.3 | D.4 |
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