2.20 Solving Inequalities.notebook - Weebly€¦ · 2.20 Solving Inequalities.notebook 2 February...

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2.20 Solving Inequalities.notebook 1 February 28, 2018 Nov 410:26 AM Solving Inequalities Homework Handout #s 1acegi, 2aceg, 3aceg, 4ac Mar 197:45 AM Warm Up: Determine the type of function.

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2.20 Solving Inequalities.notebook

1

February 28, 2018

Nov 4­10:26 AM

Solving Inequalities

Homework ­ Handout #s 1acegi, 2aceg, 3aceg, 4ac

Mar 19­7:45 AM

Warm Up:Determine the type of function.

Page 2: 2.20 Solving Inequalities.notebook - Weebly€¦ · 2.20 Solving Inequalities.notebook 2 February 28, 2018 Mar 197:45 AM x is less than or equal to y x is less than y x is greater

2.20 Solving Inequalities.notebook

2

February 28, 2018

Mar 19­7:45 AM

x is less than or equal to y

x is less than y

x is greater than or equal to y

x is greater than y

Inequality Symbols

Mar 19­7:45 AM

To indicate specific points as part of a set we draw points.

If it is a continuous group of numbers (where everything in between is included) we draw a line on the number line.

To indicate less than or equal to use a coloured in circle

To indicate less than use an open circle

Graphing on a Number Line

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2.20 Solving Inequalities.notebook

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February 28, 2018

Mar 19­7:45 AM

Set notation is a way to describe a group of    numbers.

We use:­ "curly" brackets to indicate set notation ­ { }­ the | symbol in set notation means "such that"

­ the ∈ means "element of"­ the R means the set of Real Numbers

Set Notation

Mar 19­7:45 AM

Graph on a number line.a) {2, 4, 6, 8, 10}

b) {x∈R | 3 < x ≤ 10}

Example

Page 4: 2.20 Solving Inequalities.notebook - Weebly€¦ · 2.20 Solving Inequalities.notebook 2 February 28, 2018 Mar 197:45 AM x is less than or equal to y x is less than y x is greater

2.20 Solving Inequalities.notebook

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February 28, 2018

Mar 19­7:45 AM

Same rules as solving equations.

Only difference is multiplying or dividing by a negative

­ when we multiply or divide by a negative we have       to switch the direction of the inequality.

Why?

Solving Inequalities

Jan 20­13:37

Solve the inequality and graph the solution on a number line

Page 5: 2.20 Solving Inequalities.notebook - Weebly€¦ · 2.20 Solving Inequalities.notebook 2 February 28, 2018 Mar 197:45 AM x is less than or equal to y x is less than y x is greater

2.20 Solving Inequalities.notebook

5

February 28, 2018

Mar 19­7:45 AM

Handout #s 1acegi, 2aceg, 3aceg, 4ac

Homework