Question

$y=(x-9)e^{10-x}$ 

|-11;11|

Answer 1

y`=e^10-x-(x-9)e^10-x=e^10-x *(1-x+9)=e^10-x*(10-x)=0
10-x=0
x=10∈[-11;11]
y(-11)=-20*e^21-наим
y(10)=e^0=1
u(11)=2*e^-1=2/e-наиб