14-3-4）写出图14.5电路中响应变量<img src="https://static.zxtiku.com/wangke/imgs/topic/ed365666c448ca63c046f68f331f4eb4.jpg"/>的微分方程，并求其转移函数<img src="https://static.zxtiku.com/wangke/imgs/topic/9c0a1d2a9df7b8dacb0233fafc1d588b.jpg"/>。<br/> <img src="https://static.zxtiku.com/wangke/imgs/topic/4e5ad598626696ccdac51d5127e9ade5.jpg"/>