Respuesta :

Okay, here we have this:

Considering the provided sequence, let's find the requested term, so we obtain the following:

[tex]\begin{gathered} S_n=(-1)^n \\ S_7=(-1)^7 \\ S_7=-1 \end{gathered}[/tex]

Finally we obtain that Sā‚‡ is equal to -1.

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