F`(x)=(-5*cos[m]\frac{x}{5}[/m])`=-5*(cos[m]\frac{x}{5}[/m])`=-5*(-sin[m]\frac{x}{5}[/m])*[m](\frac{x}{5}[/m])`=(5sin[m]\frac{x}{5}[/m])*[m](\frac{1}{5})=sin\frac{x}{5}=f(x)[/m]
О т в е т. Да
5)
F`(x)=(2*cos2x-sin4x)`=2*(cos2x)`-(sin4x)`=2*(-sin2x)*(2x)`-(cos4x)*(4x)`=2*(-sin2x)*(2)-(cos4x)*(4)=-4*sin2x-4cos4x=f(x)
О т в е т. Да
6)
F`(x)=((1/3)*sin3x+(1/4)cos8x)`=(1/3)*(sin3x)`+(1/4)*(cos8x)`=(1/3)*(cos3x)*(3x)`+(1/4)*(-sin8x)*(8x)`=
=(1/3)*(cos3x)*(3)+(1/4)*(-sin8x)*(8)=cos3x-2sin8x=f(x)
О т в е т. Да