Which condition is necessary for the Squeeze Theorem to be applied to limx→cf(x)\lim_{x \to c} f(x)limx→cf(x)?
f(x)f(x)f(x) must be differentiable.
f(x)f(x)f(x) must be bounded by two functions having the same limit at ccc.
f(x)f(x)f(x) must be monotonic.
f(x)f(x)f(x) must be non-negative.