Page 19 - E booklet prep 2_Neat
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Types of The Expression Representing on Notice
intervals interval distinguished the number line
[??, 8[
The limited intervals property a ? [??. 8[
]??, 8[ {??: ?? ? ??, ?? = ??}
a ? ]??. 8[
]- 8, ??] {??: ?? ? ??, ?? > ??}
a ? ]-8, ??]
]-8, ??[ {??: ?? ? ??, ?? = ??}
a ? ]-8, ??[
{??: ?? ? ??, ?? < ??}
Operations on intervals
Example (1):
? If X = [- 3 , 3] and Y = [- 1 , 5[ , find using the number line:
1) X ? Y 2) X n Y 3) X – Y 4) Y – X
Solution:
1- [- ?? , ??[
2- [- 1 , 3]
3- [- ?? , -??[
4- ]?? , ??[
1ST TERM MATH-PREP.2
19 | P a g e
