(b T [f(a)+f(b)] 复合梯形公式分解 2 [f(a)+f(x1) [f(x1)+f(x2) X,,X3 T h 2 [f(x2)+f(x3) h [f(x)+f(x4) 2n-1 +f(x [f(xn21)+f(b) 2 =2U(a)+2/(x)+2/x)+…+2f(x1)+f(b)[ ( ) ( )] 2 ( ) f a f b b a T + - = [ , ] 0 1 x x [ ( ) ( )] 2 1 (0) f a f x h T = + [ , ] 1 2 x x 2 (1) h T = [ ( ) ( )] 1 2 f x + f x [ , ] 2 3 x x 2 (2) h T = [ ( ) ( )] 2 3 f x + f x [ , ] 3 4 x x 2 (3) h T = [ ( ) ( )] 3 4 f x + f x [ , ] n-2 n-1 x x 2 ( 2) h T n = - [ ( ) ( )] n-2 + n-1 f x f x [ , ] n 1 n x x - 2 ( 1) h T n = - [ ( ) ( )] f xn-1 + f b 2 h Tn = [ f (a) + 2 f (x1 ) + 2 f (x2 ) + L+ 2 f (xn-1 ) + f (b)] 复合梯形公式分解