1,1,1,2,2,3,4,5,7,9,12,16,21找规律,第n个是多少
问题描述:
1,1,1,2,2,3,4,5,7,9,12,16,21找规律,第n个是多少
求本题公式 (能算出第100个的)
答
a(n+3)=an+a(n+1)
1,1,1,2,2,3,4,5,7,9,12,16,21找规律,第n个是多少
求本题公式 (能算出第100个的)
a(n+3)=an+a(n+1)