U3L1 sets of numbers

What are sets in math?

• Collections of well-defined things

• Collections of ambiguous things

• Collections of random things

• Collections of infinite things

What are the things "inside" a set called?

• Numbers

• Variables

• Integers

• Elements

What is the roster form used for?

• To list the elements of a set

• To perform mathematical operations

• To solve algebraic equations

• To represent geometric shapes

Why is it impossible to write the set of all fractions between 0 and 1 in a roster form?

• Because fractions cannot be listed

• Because there are an infinite number of elements

• Because it is a continuous set of numbers

• Because it includes irrational numbers

What are the real numbers made up of?

• Integers, rational numbers, and irrational numbers

• Rational numbers and whole numbers

• Positive and negative numbers

• Integers and irrational numbers

Tags

CCSS.HSN.RN.B.3

How would you write the set of real numbers greater than -2 using set builder notation?

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Tags

CCSS.HSA.CED.A.3

CCSS.HSA.CED.A.1

CCSS.HSA.REI.B.3

Consider the set {-3, -2, -1, 0, 1, 2, 3, 4, 5, 6, 7}.

Why would it be incorrect to write the set in set builder notation as x is any real number such that -3 is less than or equal to x which is less than or equal to 7?

• Because the set shown doesn't include negative numbers

• Because the set shown includes irrational numbers

• Because the set shown only includes integers and it is written in set builder notation to include all real numbers

• Because the set shown doesn't specify the type of number x is

Tags

CCSS.HSA.CED.A.3

There are several ways to correctly write the set shown in the previous question in set builder notation. Select all of the choices that are correct:

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Tags

CCSS.HSA.CED.A.3

CCSS.HSA.CED.A.1

CCSS.HSA.REI.B.3