) 中图学技术大荸学系 University of Science and Technology of China DEPARTMENT OF MATHEMATICS 这样:a0=f(x) f(x)-f(x0) d-X 1(f(x2)-f(x) Do-x f(x3)-f(x0) 2 X-x数 学 系 University of Science and Technology of China DEPARTMENT OF MATHEMATICS 这样： ( ) 0 0 a = f x 1 0 1 0 1 ( ) ( ) x x f x f x a − − =         − − − − = 1 2 0 2 0 2 1 2 1 ( ) ( ) a x x f x f x x x a         − −         − − − − = 2 1 0 1 3 0 3 0 3 2 3 1 ( ) ( ) 1 a x x a x x f x f x x x a