Question

x=3e的t次方、y=2e的t次方的二阶导数怎么求

Answer 1

x=3e^t
dx/dt=3e^t
y=2e^t
dy/dt=2e^t
dy/dx=(dy/dt)/(dx/dt)=(3e^t)/(2e^t)=3/2
d��y/闹伍dx�橘仔�=d(3/圆弯汪2)=0