5.已知数列{an}\{a_{n}\}{an}满足an+an+4=an+1+an+3(n∈N∗)a_{n}+a_{n+4}=a_{n+1}+a_{n+3}(n\in N^{*})an+an+4=an+1+an+3(n∈N∗),那么((( )))