Question

(Simple Interest and Arithmetic Sequences LC)

An arithmetic sequence begins with −20, −16, −12, −8, −4 …

Which option below represents the formula for the sequence?

f(n) = −20 − 4(n−1)
f(n) = −20 + 4(n−1)
f(n) = −20 − 4(n+1)
f(n) = −20 + 4(n+1)

Answer 1

f(n)=−20+4(n−1)