Game Development Reference
In-Depth Information
Exercise Set 5.5
x
3
þ
2
7
¼
4
6
a.
b. x þ 27
j
j ¼ 85
¼
2
3
8
6
c. x
d.
jx þ 7 4j¼8 3
¼ 5
2x
1
3
e.
¼ 3
4
5x
6
f.
¼ 2
3x
2
5
g.
h.
j7x 2j¼9
i. x 7jþ1 ¼ 4
j
j. 7jxjþ2 ¼ 16
Inequalities
Figure 5.5 illustrates the four types of relations that describe inequalities. The
relationships that characterize inequalities can unfold in inclusive and exclusive
(or non-inclusive) ways. When you use a number line, representing inclusion or
exclusion involves two basic activities:
n
A range of numbers can be greater than a given value on a number line. To
show that the range of numbers is greater than a given number, you employ
an open circle. The circle excludes the circled number from the range.
n
A range of numbers can be greater than or equal to a given value on a
number line. To show that the number is included in the range, you use a
filled circle.
The same approaches apply to ranges of numbers that are less than or equal to a
given value.
