# Week 2 SYMKC Flashcards

the set of all input values (independent, x-values) of a relation or function

domain

the set of all output values (dependent, y-values) of a relation or function

range

A function or relation has _______ domain and range if its values are unbroken over a part of the graph.

continuous

A function has __________ domain and range if its values are not connected.

discrete

Write domain and range from ____________.

least to greatest (left to right or bottom to top when looking at a graph)

Discrete or Continuous?

Continuous

Discrete or Continuous?

Discrete

Discrete or Continuous?

Continuous

In interval notation, use _____ to indicate < or > (exclusive). Also, use these symbols around ∞ or -∞

parentheses ( )

In interval notation, use _________ to indicate ≤ or ≥ (inclusive)

square brackets []

Symbol used for **All Real Numbers**

(any number that is not imaginary)

R

Symbol used for **Rational Numbers**

Q

Symbol used for the **Integers**

Z

Symbol used for the **whole numbers**

W

Symbol used for the **Natural Numbers**

N

Symbol used for the **Irrational Numbers**

P

Symbol used for a **Complex Number**

C

Symbol used for an **imaginary number**

*i*

Define the set of Complex Numbers

a number that has a real and an imaginary part

Define a Real Number

Any number that is not imaginary, can be a fraction, decimal, repeating or terminating decimal, or nonterminating decimal

Define a the set of rational numbers

Any number that can be made a fraction or has a terminating or repeating decimal.

Define the set of integers.

Any positive, negative counting number and 0.

… -3, -2, -1, 0, 1, 2, 3, …

Define the set of whole numbers

Any positive counting number including 0.

0, 1, 2, 3, 4, …

Define the set of Natural Numbers

Any positive counting number

1, 2, 3, 4, 5, …

Define the set of irrational numbers

Any decimal that does not repeat and does not terminate.

∏, e, any root that does not simplify