## Rules for Inequalities

If a, b and c are real numbers, then

- special case:
- If a and b are both positive or both negative, then .

Remarks:

Notice the rules for multiplying an inequality by a number: Multiplying by a positive number preserves the inequality; multiplying by a negative number reverses the inequality. Also, reciprocation reverses the inequality for numbers of the same sign.

Regards,

Nalin Pithwa.

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