Question

Calculaţi media aritmetică a numerelor reale x = 2(4 −√7 ) si y = 2√7

Answer 1

Ma = [2(4-√7) + 2√7] : 2 = [8- 2√7 + 2√7] : 2 (-2√7 + 2√7 se reduc) => Ma=8 : 2=4

Answer 2

$M.a.= \frac{x+y}{2}= \frac{8-2 \sqrt{7}+2 \sqrt{7} }{2}= \frac{8}{2}=\boxed{4}$