Question

Media geometrica a numerelor a=|4√5-9| si b=|4√5+9| este egala cu... . ?

Answer 1

[tex]a=|4\sqrt5-9|=9-4\sqrt5 \; \; \;\;\;(9>4\sqrt5)\\ b=|4\sqrt5+9|=9+4\sqrt5\\ m_g=\sqrt{ab}=\sqrt{(9-4\sqrt5)(9+4\sqrt5 )}=\sqrt{9^2-(4\sqrt5)^2}=\sqrt{81-80}=\sqrt1\\ m_g=1[/tex]

Answer 2

raspunsul in fisierul atasat