Respuesta :

[tex]\begin{gathered} a_{28}\text{ with a}_1\text{ and d= - 9 } \\ a_n=\text{ a + \lparen n-1\rparen d} \\ a_{28}=\text{ 1 + \lparen28 -1\rparen\lparen-9\rparen} \\ a_{28}=\text{ 1 + \lparen27\rparen\lparen-9\rparen} \\ a_{28}=\text{ 1 - 243 } \\ a_{28}=\text{ -242} \end{gathered}[/tex]

The answer is D) -242

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