Let an denote the nth term of a geometric sequence. Let a0= 256 and an+1=0.5an Part A

Write an explicit formula for this sequence.
An=
Part B

To the nearest whole number, what is the sum of the first 25 terms?

answer:

sometimes

*i think

answer:

your answer is: c. 196 7/8 in^3.

d

step-by-step explanation:

step by step solution :

step   1   :

1.1     4 = 22

(4)3 = (22)3 = 26

equation at the end of step   1   :

  ((23) • 26)2

step   2   :

equation at the end of step   2   :

  (23 • 26)2

step   3   :

final result :

  218

ya