Răspuns:
[tex]\sqrt{18} =3\sqrt{2} \\\\\sqrt{20} =2\sqrt{5} \\\\\sqrt{19}= \sqrt{2n-1} = > n=10\\\\\sqrt{2*10-1} = > \sqrt{19} } \\\\3\sqrt{2} < \sqrt{19} < 2\sqrt{5}\\ \\ raspuns-d[/tex]
[tex]0,05*2160=0,4*0,3x^2\\\\108=0,12x^2= > x^2=108:0,12= > x=\sqrt{900} = > x=30\\\\raspuns-a[/tex]
Cati lei are Denis?
[tex]24+6=30lei[/tex]
Ce suma are Denis si Ionut?
[tex]24+30=54lei[/tex]
Ce suma are Luca?
[tex]54:3=18lei[/tex]
[tex]afirmatie-adevarata[/tex]
