集合A={x|x2﹣3x﹣10≤0}，集合B={x|m+1≤x≤2m﹣1}．
（1）若B⊆A，求实数m的取值范围；
（2）当x∈R时，没有元素x使x∈A与x∈B同时成立，求实数m的取值范围．
解：因为x2﹣3x﹣10≤0，所以（x+2）（x﹣5）≤0，解得﹣2≤x≤5．所以A={x|﹣2≤x≤5}．
（1）当m+1＞2m﹣1即m＜2时，B=∅满足B⊆A；
当m+1≤2m﹣1即m≥2时，要使B⊆A成立，则m+1
Let's _____ the old man cross the road.
Information about a Robot
Name: Engkey Country: Korea
Job. A teacher Height: About ____.
Color: ____.
Abilities:
●Moves around the classrooms while speaking to students.
●____ to students.
●Dances to music by moving her ____.
Use: Be controlled by English teachers to teach English.
Good point: They needn't____.
4____320÷8；
614÷3____205；
619÷6____110；
730____17×29．
