Question

3 nr consec. care au media aritmetica 105

Answer 1

 a, a+1 , a+2 
(a+ a+1 + a+2)  / 3 =105
3a +3 = 3 · 105  I : cu 3
a+1=105 
a= 104 
  104 , 105 , 106

Answer 2

M.a=(k+1k+2+k+3)/3=105 3k/3=105==»k=105;nr.sunt 104;105;106