Question

What is the sum of a 6-term geometric series if the first term is 24 and the last term is 1,417,176?

1,395,030

1,461,460

1,527,890

1,594,320

Answer 1

sum = (first term) (1 - (common ratio)^(number of terms)) / (1 - common ratio)

Answer 2

now you just need to find what the common ratio is

Answer 3

What is the sum of the arithmetic sequence 152, 138, 124, …, if there are 24 terms?

−240

−216

−192

−168