Introduction to Set Theory

What is a set?

• A method of solving problems

• A collection of objects

• A 2-D shape

• {7}

 $\left\{\frac{a}{b}\left|a,b\in Z;b\ne0\right|\right\}\$  defines what basic set?

• Reals

• Naturals

• Rationals

• Integers

What is the following symbol's name and meaning? $\cup$  

• Union- Combines two sets or intervals

• Union- Gives the overlap of two sets or intervals

• Intersection- Combines 2 sets or intervals

• Intersection- Gives the overlap of two sets or intervals

Tags

CCSS.HSS.CP.A.1

CCSS.HSS.CP.B.7

Of the basic sets, which is the "biggest"?

• Real

• Complex

• Algebraic

• Natural

 $x\epsilon\left(-\infty,0\right)\cup\left(0,\infty\right)$  is equivalent to  $\left\{x\in R\left|x\ne n\right|\right\}$ . What is n?

• 0
  

• 1

• 2

• 3

Which number is apart of the rational set, but not the integer set?

• $\pi$

• $\frac{1}{7}$

• 6

• 10,000,000,000,000

NST stands for what?

• Newts Should Try

• New Set Theory

• Naïve Set Theory

• Never Steal, Theifs

Who proved 1+1=2

• Gauss

• Euler

• Newton

• Russell

Classify the following number:  $\sqrt{2}$  

• Real

• Rational

• Irrational

• Integer

Classify the following number: i

• Algebraic

• Real

• Natural

• Complex/Imaginary