Question

a=2(5-√5) si b=2√5 rezolvare?

Answer 1

a=2(5-√5)=10-2√5
b=2√5
ma=(a+b)/2=(10-2√5+2√5)/2=10/2=5

"/ " = impartire

Answer 2

a= 10-2√5

b=b2√5

media aritmetica = (a+b)/2 =(10-2√5+2√5)/2 =10/2=5


$\it m_a =\dfrac{a+b}{2} =\dfrac{2(5-\sqrt5)+2\sqrt5}{2} =\dfrac{2(5-\sqrt5+\sqrt5)}{2} =5$