已知M={0,1,2},N={x|x=2a,a∈M},则M∪N=( )A.{0}B.{0,1}C.{0,1,2}D.{0,1,2,4}
题型:单选题难度:简单来源:不详
已知M={0,1,2},N={x|x=2a,a∈M},则M∪N=( )A.{0} | B.{0,1} | C.{0,1,2} | D.{0,1,2,4} |
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答案
N={x|x=2a,a∈M}={0,2,4} 而M={0,1,2}, ∴M∪N={0,1,2,4} 故选D. |
举一反三
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若集合A={0,1,2,3},B={1,2,4},则集合A∪B=( )A.{0,1,2,3,4} | B.{1,2,3,4} | C.{1,2} | D.{0} |
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