ttmarkstt ttmarkstt

01-04-2018
Mathematics

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Find an equation for the nth term of a geometric sequence where the second and fifth terms are -21 and 567, respectively.

Answer Choices
A: an = 7 • (-3)n + 1
B: an = 7 • 3n - 1
C: an = 7 • (-3)n - 1
D: an = 7 • 3n

Respuesta :

sqdancefan sqdancefan

01-04-2018

The equation is
C: [tex]7 \cdot (-3)^{n-1}[/tex]

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