lim x стремится к 4 x^2+x-20/x^2-16

lim x⇒4 (x²-16)/(x²+x-20)= 0/0 = lim x⇒4 (x-4)*(x+4)/(x-4)*(x+5) = lim x⇒4 (x+4)/(x+5) = (4+4)/(4+5) = 8/9