Intro to Set Notations

Which of the following represents the sets of numbers

{ 1, 2, 3, 4, 5...} ?

• Natural Numbers

• Integers

• Rational Numbers

• Real Numbers

Which of the following represents the sets of numbers

{ ...-3, -2, -1, 0, 1, 2, 3...} ?

• Natural Numbers

• Integers

• Rational Numbers

• Real Numbers

The set of Real Numbers includes...

• Natural Numbers

• Integers

• Rational Numbers

• Irrational Numbers

• Complex Numbers

True or False?

“(“ and “)” are used like < and > symbols and mean “not included” or “open”.

• True

• False

True or False?

“[“ and “]” are used like and symbols and mean “included” or “closed”.

• True

• False

True or False?

Positive and negative infinity are always expressed as “open.”

• True

• False

Which notations will we use to write sets today?

• Inequality Notation

• Set-Builder Notation

• Boundary Notation

• Interval Notation