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Direct Integration

Use linearity and known formulas when the integrand is a linear combination of basic functions.

适用情况

基本步骤

  1. Decompose into basic terms.
  2. Integrate each term using known formulas.
  3. Combine results.

例子

(2x33x2+1)dx=12x4x3+x+C\int (2x^3 - 3x^2 + 1) dx = \tfrac12 x^4 - x^3 + x + C.


练习题

练习 1

使用直接积分法计算 (3x22x+1)dx\int (3x^2 - 2x + 1) dx

参考答案

答案x3x2+x+Cx^3 - x^2 + x + C


Summary

符号类型读音/说明在本文中的含义
\int数学符号integral不定积分符号

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