Найти Z’_(x) и Z’_(y) если Z=ln(x^2 + y^4)
z’_(x)=(1/(x^2+y^4) )* (x^2+y^4)`_(x)= (1/(x^2+y^4) )* (2x)=2x/(x^2+y^4) z’_(y)=(1/(x^2+y^4) )* (x^2+y^4)`_(y)=(1/(x^2+y^4) )*(4y^3)=4y^3)/(x^2+y^4)