Question

Encontre a derivada parcial fy se f(x,y) = y.senxy.

Answer 1

f(x,y) =y * sen(xy)

fy = (y)' * sen(xy)  + y * (sen(xy))'

fy= 1 * sen(xy)   + y * (xy)' * cos(xy)

fy= 1 * sen(xy)   + y * x * cos(xy)

fy= sen(xy)   +yx *cos(xy)