Question

DAU COROANA!!!
Calcula media aritmetica din numerele -1/2, 1/3, 5/3, 7/2..

Answer 1

Răspuns:  5/4 = 1,25

Explicație pas cu pas:

( - 1/2 + 1/3 + 5/3 + 7/2 ) : 4 = 5/4 =>  media aritmetica

   ->   ( - 1/2 + 7/2) + ( 1/3 + 5/3 )  => adun fractiile cu acelasi numitor

= ( 6/3 + 6/2 ) : 4 =

= ( 2 + 3 ) : 4 =

= 5/4

Answer 2

$\it m_a=\dfrac{-\dfrac{1}{2}+\dfrac{7}{2}+\dfrac{1}{3}+\dfrac{5}{3}}{4}=\dfrac{3+2}{4}=\dfrac{5}{4}=1\dfrac{1}{4}$