已知R为全集,A={x丨log1/2(3-x)≤2},B={x丨5/x+2≥1} ,求补集Cr(A∩B),
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已知R为全集,A={x丨log1/2(3-x)≤2},B={x丨5/x+2≥1} ,求补集Cr(A∩B),
![已知R为全集,A={x丨log1/2(3-x)≤2},B={x丨5/x+2≥1} ,求补集Cr(A∩B),](/uploads/image/z/4982316-60-6.jpg?t=%E5%B7%B2%E7%9F%A5R%E4%B8%BA%E5%85%A8%E9%9B%86%2CA%3D%7Bx%E4%B8%A8log1%2F2%283-x%29%E2%89%A42%7D%2CB%3D%7Bx%E4%B8%A85%2Fx%2B2%E2%89%A51%7D+%2C%E6%B1%82%E8%A1%A5%E9%9B%86Cr%EF%BC%88A%E2%88%A9B%EF%BC%89%2C)
A:(3-x)≥0.25,x≤2.75
B:(x+5)/x≥0,x≤-5或x>0
A∩B:x≤-5或0
B:(x+5)/x≥0,x≤-5或x>0
A∩B:x≤-5或0
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