Question

Media geometrica si aritmetica a nr x= radical 5-1 Y= radical 5+1

Answer 1

Explicație pas cu pas:

$m_{g} = \sqrt{xy} = \sqrt{( \sqrt{5} - 1)( \sqrt{5} + 1)} = \sqrt{5 - 1} = \sqrt{4} = \bf 2$

$m_{a} = \dfrac{x + y}{2} = \dfrac{ \sqrt{5} - 1 + \sqrt{5} + 1}{2} = \dfrac{2 \sqrt{5} }{2} = \bf \sqrt{5}$