Question

Se considera nr reale:
a=radical mare(2-√5)²+radical mare(2+√5)²
b=√500
a)Artati ca a=2√5
b)calculati media geometrica a nr a si b

Answer 1

a=|2-√5|+|2+√5|=√5-2+2+√5=2√5

a*b=2√2500=2*50=100

m.g.(a,b) =√ab=√100=10

Answer 2

Vezi atasamentul ....