Chapter R

Question 1

N with double line

Answer 1

natural numbers. Whole positive numbers

Question 2

W whole numbers

Answer 2

whole #s. Whole positive numbers including zero

Question 3

Z integers

Answer 3

integers. Includes -#s. negative infinity

Question 4

Q rational

Answer 4

any p/q where p and q are ints and q≠0

Question 5

I irrational

Answer 5

anything not rational. π, e, root2

Question 6

Q + I = R

Answer 6

R is real numbers

Question 7

interval notation

Answer 7

() is “open” and [] is “closed”, open does not include the numbers

Question 8

set notation

Answer 8

{ x | x > 2 }