已知U=N,A={x|x2-x-30>0},则∁UA等于( )A.{0,1,2,3,4,5,6}B.{1,2,3,4,5,6}C.{0,1,2,3,4,5}D
题型:单选题难度:一般来源:不详
已知U=N,A={x|x2-x-30>0},则∁UA等于( )A.{0,1,2,3,4,5,6} | B.{1,2,3,4,5,6} | C.{0,1,2,3,4,5} | D.{1,2,3,4,5} |
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答案
∵已知U=N,A={x|x2-x-30>0}={x|(x+5)(x-6)>0}={x|x<-5,或 x>6},则∁UA={x|-5≤x≤6}={0,1,2,3,4,5,6}, 故选A. |
举一反三
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