Question 169789
{{{f(x)=4/(2x-1)}}} Start with the given function



{{{f(-1)=4/(2(-1)-1)}}} Plug in {{{x=-1}}}



{{{f(-1)=4/(-2-1)}}} Multiply



{{{f(-1)=4/(-3)}}} Subtract



{{{f(-1)=-4/3}}} Reduce