Math

Question 1

Set

Answer 1

A collection of numbers or objects

Question 2

Element

Answer 2

every object in a set

Question 3

∈

Answer 3

Is in / member of

Question 4

∉

Answer 4

Is not in / not a member of

Question 5

n(f)

Answer 5

number of element in the set of f

Question 6

⊆

Answer 6

Is a subset of (ex. A ⊆ B)

Question 7

⊄

Answer 7

Not a subset of (ex. B ⊄ A)

Question 8

∅

Answer 8

Empty set

Question 9

Is {0} an empty set?

Answer 9

no, it has the element of “0”

Question 10

Universal set

Answer 10

Set of all elements we are considering

Question 11

Complement

Answer 11

NOT in the set (ex. A’)

Question 12

ℕ

Answer 12

Natural numbers (1,2,3…..)

Question 13

ℤ

Answer 13

Integers (ex. ….-3,-2,-1,0,1,2,3……)

Question 14

ℚ

Answer 14

Rational numbers / numbers that can be written in fraction (ex. 2=2/1, 3/4)

Question 15

ℚ’

Answer 15

Irrational numbers / numbers that cannot be written as fractions (ex. √5, x)

Question 16

ℝ

Answer 16

Real numbers / any number that can be placed on a number line (ex. π)

Question 17

∩

Answer 17

Intersection / the overlapping of the elements

Question 18

∪

Answer 18

Union / all the numbers in the elements

Question 19

Disjoint

Answer 19

No elements in common

Question 20

A ∪ A’ =

Answer 20

U

Question 21

A ∩ A’ =

Answer 21

∅