Question

Select the sequence that matches the recursive formula.
a1 = 39
an = an-1 - 5

Answer 1

a1 means the first term of the sequence is 39
\(a_{n-1}\) means "the previous term in the sequence"

so an = \(a_{n-1}\) means "to get a term an in the sequence, take the previous term \(a_{n-1}\) and subtract 5

so in other words, you should be looking for a sequence that starts w/ 39 and decreases by 5 w/ each consecutive term