Laural had to find the sum for the arithmetic series below, what did she do wrong?
Joe wanted to solve this problem: The number of visitors to a website in the first week is 40. The number of visitors each week is double the vistitors of the previous week. What is the total number of visitors in the first 10 weeks. What did he do wrong?
Megan wanted to find the 15th term in the arithmetic sequence given the explicit formula below. What did she do wrong?
First one......step B is incorrect because
a1 is not 1
Instead, you should correct a1 to this:
a1 = 3(1) - 1 = 2
The sum is (2 + 35) (12/2) = 37 * 6 = 222
Step C is incorrect because 210 is NOT = 20
Correction : 210 = 1024
The sum is
( 40) ( 1 -1024) / ( 1 - 2) = 40920