At the end of the first day, 7 weeds appear in your neighborhood park. Each day, the number of weeds increases by four times. How many weeds will be in the park at the end of 14 days?

1 Answer
Aug 17, 2016

This is a geometric sequence problem, since a common value is multiplied following each day, and not added, as would happen in an arithmetic sequence.

Explanation:

We use the formula t_n = a xx r^(n -1) to determine how many weeds will be in the park after 14 days.

In our problem, a = 7, r = 4 and n = 14.

t_14 = 7 xx 4^(14 - 1)

t_14 = "469 762 048"

Hence, there will be "469 762 048" weeds in the neighbourhood park after 14 days. I'm afraid the municipality has to do some work!

Hopefully hitch helps!