Răspunsuri

2014-10-29T17:00:00+02:00
Ma=(21+2√3 +6-2√3 ):3=27:3=9
!5x-1!≤9⇒5x-1≤9/+1⇒5x≤10/:5⇒x≤2 ⇒x=-1,0,1,2
               
2014-10-29T17:10:29+02:00
Ma=(21+2√3+6-2√3):3
ma=(21+6):3
ma=27:3
ma=9

{x∈R / |5x-1|≤19}
-9
≤5x-1≤9     | +1
-8≤5x≤10      | :5
_-8_ ≤ x ≤ 2
   5

x∈[ _-8_ ; 2]
         5

sper sa intelegi cu fractiile... Bafta!