1:设全集U={小于10的自然数},集合A,B满足A∩B={2},(CUA)∩B={4,6,8},(CUA)∩(CUB)={1,9},求集合A和B.2:在ΔABC中,内角A、B、C对边的边长分别是a、b、c,已知c=2,.(Ⅰ)若ΔABC的面积等于 ,求a,b; (Ⅱ)若
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![1:设全集U={小于10的自然数},集合A,B满足A∩B={2},(CUA)∩B={4,6,8},(CUA)∩(CUB)={1,9},求集合A和B.2:在ΔABC中,内角A、B、C对边的边长分别是a、b、c,已知c=2,.(Ⅰ)若ΔABC的面积等于 ,求a,b; (Ⅱ)若](/uploads/image/z/8899417-1-7.jpg?t=1%EF%BC%9A%E8%AE%BE%E5%85%A8%E9%9B%86U%EF%BC%9D%7B%E5%B0%8F%E4%BA%8E10%E7%9A%84%E8%87%AA%E7%84%B6%E6%95%B0%7D%2C%E9%9B%86%E5%90%88A%2CB%E6%BB%A1%E8%B6%B3A%E2%88%A9B%EF%BC%9D%7B2%7D%2C%28CUA%29%E2%88%A9B%EF%BC%9D%7B4%2C6%2C8%7D%2C%28CUA%29%E2%88%A9%28CUB%29%EF%BC%9D%7B1%2C9%7D%2C%E6%B1%82%E9%9B%86%E5%90%88A%E5%92%8CB.2%EF%BC%9A%E5%9C%A8%CE%94ABC%E4%B8%AD%2C%E5%86%85%E8%A7%92A%E3%80%81B%E3%80%81C%E5%AF%B9%E8%BE%B9%E7%9A%84%E8%BE%B9%E9%95%BF%E5%88%86%E5%88%AB%E6%98%AFa%E3%80%81b%E3%80%81c%2C%E5%B7%B2%E7%9F%A5c%EF%BC%9D2%2C.%28%E2%85%A0%29%E8%8B%A5%CE%94ABC%E7%9A%84%E9%9D%A2%E7%A7%AF%E7%AD%89%E4%BA%8E+%2C%E6%B1%82a%2Cb%EF%BC%9B+%28%E2%85%A1%29%E8%8B%A5)
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