Could somebody help me 'total differentiate' this question please?
K = 12x^3y + 10x^2y^2 + 6xy^3 +4y^4
I don't really know where to begin this is what i have down
fx = 36x^2 y + 20xy^2 + 6y^3 +4y^4
fy = 12x^3 + 10x^2(2y) + 6x(3y^2) + 16y^3
then im lost on the total differential formula
DK = dk/dx (DK) + dk/dy (DY)
(where the small 'd' represents the differential symbol
am i completely lost?