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Answer:
Answer choice A. 2187
Step-by-step explanation:
[tex]a_{7}[/tex]=-3*(3)^(7-1)
[tex]a_{7}[/tex]=-3*(3)^6
[tex]a_{7}[/tex]=3*729
[tex]a_{7}[/tex]=2187
Hope this helps!
If not, I am sorry.