摘要:
推荐背下来,这样用起来会很快 \(\begin{gather*} e^{-jat}\stackrel{\mathscr{F}}{\longrightarrow}2\pi\delta(\omega +a) \end{gather*}\) \(\begin{gather*} \delta(t +a)\s 阅读全文
摘要:
![image](https://img2022.cnblogs.com/blog/2603751/202206/2603751-20220625183450388-910992697.png) ![image](https://img2022.cnblogs.com/blog/2603751/202206/2603751-20220625183507818-712125383.png) ![im 阅读全文