问题
填空题
若集合M={x||x|≤2},N={x|x2-3x=0},则M∩N=______.
答案
由集合M中的不等式|x|≤2,解得-2≤x≤2,
集合M=[-2,2];
由集合N中的方程x2-3x=0,得x(x-3)=0,解得x=0,x=3,
∴集合N={0,3}.
∴M∩N={0}.
故答案为:{0}.
若集合M={x||x|≤2},N={x|x2-3x=0},则M∩N=______.
由集合M中的不等式|x|≤2,解得-2≤x≤2,
集合M=[-2,2];
由集合N中的方程x2-3x=0,得x(x-3)=0,解得x=0,x=3,
∴集合N={0,3}.
∴M∩N={0}.
故答案为:{0}.
句子搭配。
( ) 2. Who are they?
( ) 3. What's your uncle?
( ) 4. Is this your aunt?
A. There are five people in the family.
B. Yes, she is.
C. My uncle is a teacher.
D. They are my father, my mother, my uncle, my aunt and me.