y=2*e^x+(2x+1)*e^x
=(2x+3)*e^x
用的公式是：(uv)'=u'v+uv'
根据复合函数求导法则。y'=(2x+1)*(e^x)'+e^x *(2x+1)'=(2x+1)*(e^x)+2*e^x=(2x+3)*(e^x);不懂再追问，满意请点个采纳~
