Answer
Yes, see explanations.
Work Step by Step
The answer is Yes, because if we know $\lim_{x\to c}f(x)$ exists, we know $\lim_{x\to c}f(x)=\lim_{x\to c^+}f(x)=\lim_{x\to c^-}f(x)$ and we can use $\lim_{x\to c^+}f(x)$ to obtain the others.
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