Question

What is the sum of the geometric sequence 1, 4, 16, … if there are 8 terms?

Answer 1

42372 what i got

Answer 2

a lot of multiplying and dividing

Answer 3

1
4
16
64
256
1024
4096
16384

Answer 4

1, 4, 16

Answer 5

21,845

87,381

42,372

55,987

the answers that are given

Answer 6

then it is A

Answer 7

yes tht makes more sense

Answer 8

explain please?

Answer 9

if you add all the terms above you get 21845

Answer 10

= (4^8 -1 ) / 3 = 21,845