Lim (6/(x^2-9)-1/(x-3) при Х стремится к 3

Question

Lim (6/(x^2-9)-1/(x-3) при Х стремится к 3

Answer 1

Lim((6-(x+3))/(x²-9)=lim((3-x)/(x+3)(x-3)=lim(-(x-3)/(x+3)(x-3)=lim(-1/(x+3)=-1/6