Exercise · ZW-ONE-SIDED-LIMITS-002 · ★☆☆ Basic

Compute \(\lim_{x\to 0^-}\,\frac{\left|{x}\right|}{x}\).

Choose one option.

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  • A. \(-1\)

Explanation

For x < 0, |x| = −x, so \(\dfrac{|x|}{x}=-1\) and the limit from the left is \(-1\).

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Review the concept: One-sided limits

The left-hand limit uses only values \(x<a\) and the right-hand limit only values \(x>a\). The limit of \(f\) at \(a\) exists if and only if both one-sided limits exist and are equal.

\[\lim_{x\to a^-}f(x)=\lim_{x\to a^+}f(x)=L\]

More practice problems: one-sided limits

← ZW-ONE-SIDED-LIMITS-001 ZW-ONE-SIDED-LIMITS-003 →