ttmarkstt ttmarkstt 01-04-2018 Mathematics contestada Brainliest and five stars to correct answer 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