Question

What is the sum of a 11–term geometric series if the first term is 4 and the last term is 4,096?
Answer
a 9,124
b 8,188
c 11,264
d 45,056

Answer 1

the geometric sequence is 2^n starting at n =2

Answer 2

huh??

Answer 3

so you have

2^2 = 4
2^3 = 8
2^4 = 16
2^5 = 32
2^6 = 64

it goes all the way until 2^12

get the sum of those 11 numbers