l=1时,可得复合梯形求积公式 f(x)xh=b∑∑Cf(x) k=0i=0 ∑f(x)+f(xk+1 k=0 复合梯形公式T b f(a)+2∑f(xk)+f(b 2n k=1 1=2时,可得复合 Simpson求积公式 f(x)xsS=b∑∑c}2(x,) k=0i=0l = 1时,可得复合梯形求积公式 n b a f x dx » T ò ( ) åå - = = = + 1 0 1 0 (1) ( ) n k i i k i h C f x å - = = + + 1 0 1 [ ( ) ( )] 2 1 n k k k h f x f x [ ( ) 2 ( ) ( )] 2 1 1 å - = + + - = n k n k f a f x f b n b a 复合梯形公式 T l = 2时,可得复合Simpson求积公式 åå - = = + = 1 0 2 0 2 (2 ) ( ) n k i i k i n h C f x b a f x dx » S ò ( )