Simple calculus question

Strictly speaking, lim(x -> y) will never be equal for any limit as long the function's a "curve" (that is, f(x) = b, then lim(x -> y) = lim(x -> z). May be avoided by taking tops or bottoms of Sine or Cosine curves as well.)

But actually, the answer is Infinity. Cause ey, what's Infinity multiplied by -1?

Edit: Wait, is it undefined?