=(b-a)∑C (-a)∑(m k=0 (b-a)∑c (n E=maleK 若k≤n,C(>0,有 列s(b-a)s∑C=(b-a)∑c1 k=0 =(b-a)∑cg(x)(g(x)=1) b =8g(x)dx=8dx=(b-aan n I − I = = − n k k n b a Ck 0 ( ) ( ) = − n k k n b a Ck 0 ( ) In − In ( ) = − n k n b a Ck 0 ( ) ( ) max{| |} k = 若 k n , Ck (n) 0,有 n n I − I = − n k n b a Ck 0 ( ) ( ) = = − n k n b a Ck 0 ( ) ( ) 1 = = − n k k n k b a C g x 0 ( ) ( ) ( ) (g(x) 1) = b a g(x)dx = b a dx = (b − a)