问题
选择题
集合A={x∈N|x≤6},B={x∈N|x2-3x>0},则A∩B=( )
A.{1,2}
B.{3,4,5}
C.{4,5,6}
D.{3,4,5,6}
答案
A={x∈N|x≤6}={0,1,2,3,4,5,6},
B={x∈N|x2-3x>0}={x|x>3,x∈N},
∴A∩B={4,5,6},
故选C.
集合A={x∈N|x≤6},B={x∈N|x2-3x>0},则A∩B=( )
A.{1,2}
B.{3,4,5}
C.{4,5,6}
D.{3,4,5,6}
A={x∈N|x≤6}={0,1,2,3,4,5,6},
B={x∈N|x2-3x>0}={x|x>3,x∈N},
∴A∩B={4,5,6},
故选C.