Răspuns:
1
Explicație pas cu pas:
1. [tex]=2\sqrt{2}+\sqrt{2}-3\sqrt{2}=0\\[/tex]
2. [tex]=18\sqrt{3*5}=18\sqrt{15}[/tex]
3. [tex]=-3\sqrt{4}=-3\sqrt{2^{2} }= -3*2=-6[/tex]
4. [tex]=16*3=48[/tex]
B. [tex]m=\frac{a+b}{2}[/tex]
1.[tex]m=\frac{3+7}{2} =\frac{10}{2} =5[/tex]
2.[tex]m=\frac{\frac{4}{3}+\frac{1}{3} }{2}=\frac{\frac{5}{3} }{2} =\frac{5}{3}*\frac{1}{2}=\frac{5}{6}[/tex]
