Question

Cine ma ajuta si pe mine cu acest exercitiu?
1.Sa se afle media geometrica si aritmetica : a=8-√28
b=2√7+8

Answer 1

$m_{g}= \sqrt{(8- \sqrt{28})(2 \sqrt{7}+8) } }= \sqrt{(8-2 \sqrt{7} } )(8+2 \sqrt{7} )= \sqrt{64-28$=6
$m_{a}= \frac{(8- \sqrt{28})+(8+ \sqrt{28}) }{2}= \frac{16}{2}=8$