3,7 ... 6,9
[tex]a_{1}[/tex] [tex]a_{2}[/tex] [tex]a_{3}[/tex]
[tex]a_{2[/tex]=(3,7+6,9)/2=5.3
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3,7 ... 6,9
[tex]a_{1}[/tex] [tex]a_{2}[/tex] [tex]a_{3}[/tex]
[tex]a_{2[/tex]=(3,7+6,9)/2=5.3