Grade 12 Calculus. Only use grade 12 knowledge and don't use derivative rules when solving

9) a) Find the equation of the tangent to the curve y = - 1 + 1 where the curve intersection the x- x+3 axis. [4 Marks] b) Consider the original function again, y = -- 1 x+3 + 1, does the limit exist when x = 3? Why or why not? [1 Marks]