Y`=-6sinx+24/π=0 -6sinx=-24/π sinx=4/π∉[-1;1] y(-2π/3)=6cos(-2π/3)+24*(-2π/3)/π+5=-3-16+5=-14-наим y(0)=6cos0+24*0/π+5=6+0+5=11-наиб