设z=f(x,y)且x=t+sint,y=t^2,f(x,y)可微,则dz/dt

题目

设z=f(x,y)且x=t+sint,y=t^2,f(x,y)可微,则dz/dt
设z=f(x,y)且x=t+sint,y=t^2,f(x,y)可微,求dz/dt

答案

f对x的倒数乘以（1+cost）加上f对y的倒数乘以2t