简述加强课程内容与学生实际的联系的涵义。
参考答案:
1.数学源于现实生活
2.数学存在于现实生活
3.当今社会无处不用到数学,生活现实是学生学习数学的起点和归宿
Canada is the only country that _____ an entire continent in the world, facing the Atlantic ____ the east. [ ]
A. makes up; on
B. covers; on
C. takes up; to
D. do up; in
定义在R上的函数f(x)满足对任意x,y∈R有f(x+y)=f(x)+f(y)-1,且当x<0时,f(x)<1.
(I)证明f(x)在R上是增函数;
(II)若f(3)=4,求函数f(x)在[1,3]上的值域.