Частная производная функции z=y*sin(3x+y) ?

Уравнение:CH4+O2=CO2+2H2O50 м3 - 100%х м3 - 90%х= 50*90/100= 45 м3 - объём метанаПрпорция:45-х22.4- 22.4х= 45*22.4/22.4 = 45 м3 - объём кислорода

[latex]z=ycdoysin(3x+y);\ frac{partial}{partial x}(ysin(3x+y))=yfrac{partial}{partial x}(sin(3x+y))=\ =ycos(3x+y)cdotfrac{partial}{partial x}(3x+y)=3ycos(3x+y);\ frac{partial}{partial y}(ysin(3x+y))=sin(3x+y)frac{partial}{partial y}y+yfrac{partial}{partial y}sin(3x+y)=\ =sin(3x+y)cdot1+ycos(3x+y)frac{partial}{partial y}(3x+y)=\ =sin(3x+y)+ycos(3x+y)[/latex]