外研版（三起）（2012）小学英语三年级下册Module 4 Unit 1 Do you like meat$%Module 4 Unit 1 Do you like meat$%教案(1)

外研版（三起）（2012）小学英语三年级下册Module 4 Unit 1 Do you like meat$%Module 4 Unit 1 Do you like meat$%导学案(1)

作业1设x1=a∈(0),xn+1= sin,求证:lim=0 证明:因x1=a∈(0,),xn+1=sin,故0