Răspuns:
1. b)[tex]\sqrt{3}[/tex] x= [tex]\sqrt{12}[/tex] [tex]\sqrt{3}[/tex]x= 2[tex]\sqrt{3}[/tex] => x= [tex]\frac{2\sqrt{3} }{\sqrt{3} }[/tex]= 2
2. [tex](1+\sqrt{5} )^{2}[/tex] + [tex](1- \sqrt{5} )^{2}[/tex]= 1+2[tex]\sqrt{5}[/tex] + 5 + 1- 2[tex]\sqrt{5}[/tex] + 5=
= 2+ 10= 12 - nr natural
3. inlocuiesti x cu 1, 4, 2
f(1) + f(4)- f(2)= 0 +2- 1= 2-1 = 1
[tex]log_{a}[/tex]1= 0 [tex]log_{a}[/tex]a= 1
4. f(1)= [tex]3^{1}[/tex]+ [tex]log_{3}[/tex]1= 3 + 0 = 3
