Can someone remind me of the rules please? When do I switch the inequality? When don't I?

Any input would be GREATLY appreciated!

Thanks in advance!

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- May 7th 2010, 04:46 PMs3aInequalities
Can someone remind me of the rules please? When do I switch the inequality? When don't I?

Any input would be GREATLY appreciated!

Thanks in advance! - May 7th 2010, 04:57 PMskeeter
- May 7th 2010, 05:01 PMslovakiamaths
you will switch the ineqality if

(i) multiply by a -ve sign

(ii) inverse the relation

for example: (i) 5 <6 but -5>-6

(ii) $\displaystyle \frac{3}{2}>\frac{1}{3}$

but $\displaystyle \frac{2}{3} <\frac{3}{1}$(Happy)