Calculus-Partial Derivatives

[salvamg89]

help! how do you calculate:

((d^2)z)/(dxdy)

i hope you understand. i couldn't write it in another way. thank you!

[delightXD]

((∂^2)z)/(∂x∂y)=∂(∂z/∂y)/∂x=∂(­8y)/∂x=0

[kitch14]

thanks so much! this video has really helped me understand!