中图苔技术大荸数学系 University of Science and Technology of China DEPARTMENT OF MATHEMATICS ●线性插值 X X XI 0 L(x)=f(x)(x)+f(x1)1(x)数 学 系 University of Science and Technology of China DEPARTMENT OF MATHEMATICS ⚫线性插值 1 0 0 1 0 1 1 0 ( ) , ( ) x x x x l x x x x x l x − − = − − = ( ) ( ) ( ) ( ) ( ) 1 0 0 1 1 L x = f x l x + f x l x