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(1,0)或(-1,-4) (-1,0)或(1,4) (-1,4)或(1,4) (-1,0)或(1,0)
[-1,2] [-2,2] [0,2] [-2,0]
[0,2] R (﹣1,4] (﹣1,0]∪[2,4]
(0,0),(1,4) (0,0),(3,4)
(﹣2,0),(1,4) (﹣2,0),(﹣1,4)
(1,4) (4,+∞) (,1)∪(4,+∞) (0,1)∪(1,4)
={﹣1,1,2,3,4}, ={﹣2,﹣1,0,1,2},则(∁U.A.)∩B.=( ) A.{3,4}B.{﹣2,3} {﹣2,4} {﹣2,0}
={x|≥0}, ={x|log2x<2},则(∁R.A.)∩B=( ) A.(0,3)B.(0,3] [﹣1,4] [﹣1,4)
(0,0),(1,4) (0,0),(3,4) (﹣2,0),(1,4) (﹣2,0),(﹣1,4)
(﹣2,﹣4) (0,﹣4) (2,4) (0,4)
(﹣1,4) (﹣2,0) (﹣1,0) (﹣1,2)
[-1,4] [0,16] [-2,2] [1,4]
(0,0),(1,4) (0,0),(3,4) (﹣2,0),(1,4) (﹣2,0),(﹣1,4)