复化梯形求积公式：定积分近似计算的一个有效方法——复化牛顿-科玆方法，其中最常用的当推复化梯形公式。-Rehabilitation of trapezoidal quadrature formula: Approximate calculation of definite integral is an effective way- rehabilitation of the Newton- Kotz methods, the most commonly used when pushing rehabilitation of trapezoid formula.