TOPIC6: SETS

SETS

Definition

-  a collection of objects that have something in common or follow rule. The objects u the set are called its elements. Set  notation uses curly braces, with elements separated by commas.

Example 1:
What is the set of all fingers?

Solution:
P = {Thumb, Index, Middle, Ring, Little}
- Note that there are others name for these fingers: The index finger is commonly referred to as the pointer finger, the ring finger is also known as the fourth finger, and the little finger is often referred to as the pinky. Thus, we could have listed the set of fingers as:

P = {Thumb, Pointer, Middle, Fourth, Pinky}

Example 2: Let T be the set of all days in a week.

Solution: T = {Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, Sunday}

Question 1: Let G be the set of all whole numbers less then ten?

Question 2: What is the set of all letters in the English alphabet?

Question 3: Which of the following is the set of all oceans on earth?

A. G = {Atlantic, Pacific, Arctic, Indian, Antarctic}
B. E = {Amazon, Nile, Mississippi, Rio Grande, Niagara}
C. F = {Asia, Africa, North America, South America, Antarctic, Europe, Australia}
D. All of the above