Question

homework 11: section 2.7
score: 40/180 answered: 4/18
question 5
express the set ( x < 0 ) using interval notation.
question help:
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Explanation:

Step1: Recall interval notation rules

For \( x < a \), the interval notation is \( (-\infty, a) \) because \( x \) can take any value less than \( a \), and \( -\infty \) is not included (so we use an open parenthesis), and \( a \) is also not included (open parenthesis).

Step2: Apply to \( x < 0 \)

Here, \( a = 0 \). So using the interval notation rule, we write it as \( (-\infty, 0) \).

Answer:

\((-\infty, 0)\)