Mathematics

Adalynn Baxter

26 July, 08:33

Write the explicit formula for the geometric sequence.

a1 = - 5 a2 = 20 a3 = - 80

A. an = - 5 • (-4) n

B. an = - 5 (-4) n-1

C. an = - 4 (-5) n-1

D. an = - 5 • (4) n

+2

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