Mathematics for IGCSE & O level - Inequalities (Section 1 - No. 43)
In the example x ≥ -3, what does the number line representation look like?
Open circle at -3, with the line going to the left.
Closed circle at -3, with the line going to the left.
Open circle at -3, with the line going to the right.
Closed circle at -3, with the line going to the right.
解释
A closed circle indicates the number is included and greater than -3