[tex]d=a_{n+1} - a_{n}[/tex][tex]a_{14}=a_{8}+6d[/tex][tex]6d=80-98=-18[/tex][tex]d=-3[/tex]
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[tex]d=a_{n+1} - a_{n}[/tex]
[tex]a_{14}=a_{8}+6d[/tex]
[tex]6d=80-98=-18[/tex]
[tex]d=-3[/tex]