f`(x)=(10x-35)e^(x-11) +e^(x-11)*(5x²-35x+55)=e^(x-11)*(10x-35+5x²-35x+55)==e^(x-11)*(5x²-25x+20)=05(x²-5x+4)=0x1+x2=5 U x1*x2=4x1=1 U x2=4 + _ +---------------------------------------------------- 1 4 max miny(1)=(5-35+55)e^(-10)=25/e^10 наибy(4)=(80-140+55)e^(-7)=-5/e^7 наим