f'(x)=-2/(x-1)²
Объяснение:
f(x)=(x+1)/(x-1)
f'(x)=(1*(x+1)-1*(x-1))/(x-1)²=((x+1)-(x-1))/(x-1)²=(x+1-x+1)/(x-1)²=-2/(x-1)²=-2/(x-1)²
Удачи)
