已知数列{an}满足a1=-2,an+1(下标)=2+2an/(1-an),则a4=

问题描述:

已知数列{an}满足a1=-2,an+1(下标)=2+2an/(1-an),则a4=

a1=-2,an+1(下标)=2+2an/(1-an),
a2=2/3
a3=6
a4=-2/5