+图钭学技术大荸数学系 University of Science and Technology of china DEPARTMENT OF MATHEMATICS 例 10(O)=(b-a)f(a) b-a (f) at b 10()=(b-a)f(-)数 学 系 University of Science and Technology of China DEPARTMENT OF MATHEMATICS ( ) ( ) ( ) I 0 f = b − a f a 例： ) 2 ( ) ( ) ( ( ) 2 ( ) ( ) 0 0 a b I f b a f f a b a I f + = − − =