技巧---数学分析1：变换积分次序FormulaExplanation
Formula∫x0[∫u0φ(t)dt]du=∫x0[∫xtφ(t)du]dt∫0x[∫0uφ(t)dt]du=∫0x[∫txφ(t)du]dt\int_0^x \left[ \int_0^u \varphi(t)dt\right] du = \int_0^x \left[ \int_t^x \varphi(t)du\right] dt ExplanationAs for dou...
