Determine whether the following limit exists. Compute the limit if it exists. x-3x-4 lim x-4 x-4 x-3x-4 Is the function f(x) = defined when x=4? x-4 O Yes O No Does the function need to be defined at x = 4 in order for its limit to exist at x=4? O No O Yes To evaluate the limit, begin by factoring the numerator. x-3x-4= (Factor completely. Do not simplify.) When f(x) is defined, common binomial factors can be cancelled from the numerator and denominator x-3x-4 X-4 = (Simplify your answer.)