Using the Sandwich Theorem, if 3x≤f(x)≤x2+2x+13x \leq f(x) \leq x^2 + 2x + 13x≤f(x)≤x2+2x+1 for all xxx near 111, what is limx→1f(x)\lim_{x \to 1} f(x)limx→1f(x)?
333
444
222
Cannot be determined