Sagot :
f(x)=(x-4)e^(-0.25x+5)
f'(x)=1*exp(-0,25x+5)+(x-4)*(-0,25)*exp(-0,25x+5)
=(1-0,25x+1)*exp(-x/4+5)
=(-x/4+2)*exp(-x/4+5)
f'(x)=1*exp(-0,25x+5)+(x-4)*(-0,25)*exp(-0,25x+5)
=(1-0,25x+1)*exp(-x/4+5)
=(-x/4+2)*exp(-x/4+5)
f(x)=(x-4)e^(-0.25x+5)
f'(x)=1*exp(-0,25x+5)+(x-4)*(-0,25)*exp(-0,25x+5)
=(1-0,25x+1)*exp(-x/4+5)
=(-x/4+2)*exp(-x/4+5)
f'(x)=1*exp(-0,25x+5)+(x-4)*(-0,25)*exp(-0,25x+5)
=(1-0,25x+1)*exp(-x/4+5)
=(-x/4+2)*exp(-x/4+5)