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(﹣∞,1)∪(1,3] (﹣∞,0]∪(1,3] (﹣∞,0)∪(1,3) (﹣∞,0)∪(1,3]
x+3y-5=0 x+3y-15=0 x-3y+5=0 x-3y+15=0
={1,3,x}, ={1,x2},A.∪B.={1,3,x},则满足条件的实数x有( ) A.1个 B.2个 3个 4个
(1,3] (1,3) (3,+∞) [3,+∞)
[-1,3] (-1,3) (-∞,-1]∪[3,+∞) (-∞,-1)∪(3,+∞)
[-5,-1] [-2,0] [-6,-2] [1,3]
={1,3,x}, ={1,},A.∪B.={1,3,x},则满足条件的实数x有( ) A.1个 B.2个 3个 4个
[-5,-1] [-2,0] [-6,-2] [1,3]
(0,1)∪(1,3) (1,3) (0,1)∪(1,2) (1,2)
(﹣3,0)∪(1,+∞) (﹣3,0)∪(0,3) (﹣∞,﹣3)∪(3,+∞) (﹣3,0)∪(1,3)
(1,3) (﹣5,3)或(1,3) (﹣2,6) (﹣2,6)或(﹣2,1)
[﹣8,﹣3] [﹣5,﹣1] [﹣2,0] [1,3]