Inequalities (Junior Cert Mathematics): Flashcards

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Solving Inequalities
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What are inequalities?

Mathematical expressions showing relationship where one value is greater/less than another

Meaning of symbol >>

Greater than

Meaning of symbol <<

Less than

Meaning of symbol ≥\geq

Greater than or equal to

Meaning of symbol ≤\leq

Less than or equal to

Rule when multiplying/dividing by negative in inequality

Reverse the inequality sign

Circle type for strict inequalities (>> or <<)

Open circle

Circle type for ≥\geq or ≤\leq

Closed circle

Arrow direction for >> or ≥\geq

To the right

Arrow direction for << or ≤\leq

To the left

Graphing inequality over Z\mathbb{Z}

Plot only integer points

Graphing inequality over N\mathbb{N}

Plot only positive integers from 1

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