3 years ago

What is the formula for the following geometric sequence? -5, -10, -20, -40, ... an = -5 · 2n - 1 an = -5 · (-2)n - 1 an = -2 ·

(-5)n - 1 an = 2 · (-5)n - 1

1 answer:

vazorg [7]3 years ago

8 0

$-5 * 2^{n-1}$

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