18/01/30 20:36:22.76 tDXdTeaU.net
>>330
d(x^3+x^2y-y^2)^10=10(x^3+x^2y-y^2)^9d(x^3+x^2y-y^2)=10(x^3+x^2y-y^2)^9(3x^2dx+2xydx+x^2dy-2ydy)=0
>>330
微分とはdf(x,y)すなわちf_x(x,y)dx+f_y(x,y)dyのこと
18/01/30 20:36:22.76 tDXdTeaU.net
>>330
d(x^3+x^2y-y^2)^10=10(x^3+x^2y-y^2)^9d(x^3+x^2y-y^2)=10(x^3+x^2y-y^2)^9(3x^2dx+2xydx+x^2dy-2ydy)=0
>>330
微分とはdf(x,y)すなわちf_x(x,y)dx+f_y(x,y)dyのこと