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人教版普通高中课程标准实验教科书·数学·选修2-2(A版)中引进了定积分,讲了它的基本概念和思想方法.在学习过程中,笔者认为:利用定积
People’s Education Edition ordinary high school curriculum standard experimental textbook · Mathematics · Elective 2-2 (A version) introduced the definite integral, talked about its basic concepts and methods of thinking in the learning process, the author believes that the use of fixed product