Evaluate $\lim\limits_{x \to 3^-} f(x)$ and $\lim\limits_{x \to 3^+} f(x)$ for the function: $f(x) = \frac{|x - 3|}{x - 3}$ |
$(−1, 1)$ $(1, -1)$ $(1, 1)$ $(-1, -1)$ |
$(−1, 1)$ |
The correct answer is Option (1) → $(−1, 1)$ ## Left-hand limit $\lim\limits_{x \to 3^-} f(x)$: For $x < 3$, $x - 3$ is negative, so $|x - 3| = -(x - 3)$. Thus, for $x < 3$: $f(x) = \frac{-(x - 3)}{x - 3} = -1$ So, as $x \to 3^-$, $f(x) = -1$. $\lim\limits_{x \to 3^-} f(x) = -1$ Right-hand limit $\lim\limits_{x \to 3^+} f(x)$: For $x > 3$, $x - 3$ is positive, so $|x - 3| = x - 3$. Thus, for $x > 3$: $f(x) = \frac{x - 3}{x - 3} = 1$ So, as $x \to 3^+$, $f(x) = 1$. $\lim\limits_{x \to 3^+} f(x) = 1$ |