The number of visitors to a website in the first week is 50. The number of visitors each week is double the number of visitors the previous week. What is the total number of visitors to the website in the first 8 wk?

AngelRay May 1, 2018

#1**0 **

Use Geometric Sequence formula:

S = F x [1 - R^N ] / [1 - R], where S=Sum, F= First term, R=Common ratio, N=Number of terms

S = 50 x [1 - 2^8 ] / [1 - 2]

S = 50 x [1 - 2^8] / [-1]

S = 50 x [1 - 256] / [-1]

**S** = 50 x [-255] / [-1]

S =50 x 255

**S = 12,750 - visitors to the website in the first 8 weeks.**

Guest May 2, 2018