Question

Find an explicit rule for the nth term of the sequence.

-4, -8, -16, -32, ...

a. an = -4 • 2n - 1

b. an = 2 • -4n + 1

c. an = 2 • -4n

d. an = -4 • 2n

Answer 1

I think it is a, if it is really \[a_n=- 4 \times 2^{n-1}\]

Answer 2

yes it is :) thx so much!

Answer 3

yw