Answer
a) 3
b) 3
c) 3
d) 3
Work Step by Step
The function is continuous at the point $x = 0$ and thus,
$ \lim\limits_{x \to 0^-} g(x) = \lim\limits_{x \to 0^+} g(x) = \lim\limits_{x \to 0} g(x) = g(0) = 3 $.
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