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Module 8
Compound Inequalities
| Question | Answer |
|---|---|
| When solving exercises with inequalities, what are the three forms that a solution set can be expressed? | 1. Symbolic 2. Graphical 3. Interval Notation |
| x ≤ 4 is an example of... | ...a Symbolic Solution |
| (-∞,4] is an example of... | ...an Interval Notation |
| Solve the inequality: 2x + 3 ≤ 11 | 2x + 3 ≤ 11 ........-3....-3 2x ≤ 8 |
| How many solutions does 2x ≤ 8 have? | Infinite |
| The solution of: -4m>-20 equals... | m<5 |
| The solution set of a compound inequality formed by the word "and" is the... | ...intersection of the solution sets of the two inequalities |
| Intersection of Two Sets | The set of all elements common to both sets |
| Solve: x-7<2 and 2x+1<9 | x-7<2 and 2x+1<9 ..+7+7............-1..-1 x<9 and 2x<8 x<9 and x<4 |
| Find solution set of: x<9 and x<4 | (-∞,4) |
| The solution set of a compound inequality formed by the word "or" is... | ...the union of the solution sets of the two inequalities |
| The union of two sets... | is the set of elements that belong to either (one, or the other, or both) of the sets |
| Notation a ≥ b means that | a is greater than or equal to b (or, equivalently, not less than b) |
| The notation a ≤ b means that | a is less than or equal to b (or, equivalently, not greater than b) |
| The notation a < b means that | a is less than b. |
| The notation a > b means that | a is greater than b |
| Solve 5x-3≤10 or x+1≥5 | 5x-3≤10 or x+1≥5 .....+3 +3........-1-1 5x≤13 x≥4 /5 /5 x≤13/5 x≥4 |
| Find the solution set for x≤13/5 x≥4 Write in Interval Notation | Solution Set: (-∞13/5]U[4,∞) |
| If all real numbers, solution set is what? | Solution Set: (-∞,∞) |