Question

Ajutor !! Va rog!!
:))​

Answer 1

Răspuns:

Explicație pas cu pas:

a) a=(5$\sqrt{3}$+6$\sqrt{3}$-$\frac{9}{\sqrt{3} }$)*$\frac{\sqrt{3} }{2}$ = 11$\sqrt{3}$*$\frac{\sqrt{3} }{2}$-$\frac{9}{\sqrt{3} }$*$\frac{\sqrt{3} }{2}$ =$\frac{33} {2}$-$\frac{9} {2}$=$\frac{24} {2}$ = 12

b) b=$(\frac{1}{3})^{-1}= \frac{3}{1} = 3$

media aritmetica = $\frac{12+3}{2}=\frac{15}{2}=7,5$