Question

Explicitati modulul.
|√19-4|
|2-√10|
|√7-2√2|
|√22-3√2|

Ajutatima va rig,dau 20 puncte + coroana la primul raspuns

Answer 1

rad(19)>=4 <=> 19>=16 (adevarat). => rad(19)-4>=0 => |rad(19)-4|=rad(19)-4.

2>=rad(10) <=> 4>=10 (fals). => 2<rad(10) => 2-rad(10)<0 => |2-rad(10)|=-(2-rad(10))=rad(10)-2.

rad(7)>=2rad(2) <=> 7>=8 (fals). => rad(7)<2rad(2) => rad(7)-2rad(2)<0 => |rad(7)-2rad(2)|=-(rad(7)-2rad(2))=2rad(2)-rad(7).

rad(22)>=3rad(2) <=> 22>=18 (adevarat). => rad(22)-3rad(2)>=0 => |rad(22)-3rad(2)|=rad(22)-3rad(2).