Inequalities and Simultaneous Equations - Inequalities
In an equation the '=' sign means that the two sides are identical. But what happens when the two sides are not identical?
If this is the case you need to use inequalities to show the relationship between the two sides.
< means 'less than'
≤ means 'less than or equal to'
> means 'greater than'
≥ means 'greater than or equal to'
For example, if x > 2, then x = 3, 4, 5, 6, 7, ... (x is greater than, but not equal to 2, so don't include the 2).
If y is ≤ 4, then y = 4, 3, 2, 1, 0, -1, ... (y is less than or equal to 4, so do include the 4).
If z ≥ 3, what are the possible values of z?