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Inequalities

Inequalities

liquid394

such a stupid question to ask, but when do you need to switch the sign, as I have some how forgotten?

Reply 1

Notnek

If you multiply or divide an inequality by a negative number, you must switch the signs around e.g.

\displaystyle -2x>6 \implies x<-3

\displaystyle \frac{y}{-4}\leq 2 \implies y\geq -8

(edited 11 years ago)

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