Question

Am nevoie de ajutorul vostru!! Vă rog! ​

Answer 1

-c>-d <=> c<d

Conditii de incluziune:

$c < \frac{3c+d}{4}\\\frac{c+3d}{4} < d$

$c < \frac{3c+d}{4} < = > 4c < 3c+d < = > 4c-3c < d < = > c < d \;\;(adevarat)\\\frac{c+3d}{4} < d < = > c+3d < 4d < = > c < 4d-3d < = > c < d \;\;(adevarat)$