Finding Indicated Partial Derivatives?

Question

f(x,y) = x^4 y^4; find fxxx and fxyx 

I need help solving this equation. Can anyone help me?

Answer 1

The Power rule of derivative : .

The function is .

Apply first partially derivative with respect to x.

Apply  second partially derivative with respect to x.

Apply  third partially derivative with respect to x.

.

The function is.

Apply  partially derivative with respect to y.

Apply  partially derivative with respect to x.