Respuesta:
3
Explicación paso a paso:
[tex]t_n = a_1 +r(n-1)\\\\t_8 = -18 +r(8-1)=3\\\\-18 + 7r = 3\\\\7r = 21\\\\r = 3[/tex]
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Respuesta:
3
Explicación paso a paso:
[tex]t_n = a_1 +r(n-1)\\\\t_8 = -18 +r(8-1)=3\\\\-18 + 7r = 3\\\\7r = 21\\\\r = 3[/tex]