Consider the following sequence of numbers. 3,-9,27,-81,...
I need common ratio & sum of 1st five terms

Please check the explanation

Step-by-step explanation:

Given the sequence

A geometric sequence has a constant ratio and is defined by

Computing the ratios of all the adjacent terms

The ratio of all the adjacent terms is the same and equal to

Therefore, the common ratio is:

Determining the sum of 1st five terms

As the first element is

Geometric sequence sum formula is given by

Plugin the values

                    ∵

Therefore, the sum of the first five terms of the sequence is: 183        

if you are saying purchasing 3 social media ads and one newspaper ad counts as one purchase then there are:

6 purchases

if you are asking how many of each then:

18 social media ads

6 newspaper ads

where is the gragh

step-by-step explanation: