Question

how can we solve d/dy(du/dx) ?

Answer 1

is that the product rule ?

Answer 2

sorry i can not understand tha but its used in partial differrential equation

Answer 3

post the question xD

Answer 4

we have to find d/dy(du/dx) of (2x-3y)(-3x+8y)

Answer 5

im assuming
\[u = (2x-3y)(-3x+8y)\]
then find du/dx as derivitive with respect to x, use product rule
\[\frac{du}{dx} = 2(-3x+8y)-3(2x-3y)\]
Then take derivative of that with respect to y
\[\frac{d}{dy} = 16-(-9) = 25\]

Answer 6

thnx :)