Question

有若干个数,第1个数记做a1,第2个数记做a2,

Answer 1

1)a2=1/[1-(-1/3)]=3/4

a3=1/[1-3/4]=4

a4=1/[1-4]=-1/3

2)经计算a5=3/4

a6=4

a7=-1/3

则该数列为以"-1/3,3/4,4"为循环

2010/3=670

则a2010=4

a2011=-1/3