Question

media aritmetica a numerelor: radical din 7 +2 si radical din 7-2

Answer 1

   
[tex]\displaystyle m_a = \frac{( \sqrt{7} +2) + ( \sqrt{7} -2)}{2} = \frac{ \sqrt{7} + \sqrt{7} +2 -2}{2} =\frac{ 2\sqrt{7} }{2} =\boxed{\sqrt{7} }[/tex]