2025 AMC 8 Problems/Problem 4
Lucius is counting backward by s. His first three numbers are
,
, and
. What is his
th number?
Solution
By the formula for the th term of an arithmetic sequence, we get that the answer is
where
and
which is
.
~Soupboy0
Solution 2
You could brute force(not really recommended) the sequence, and we get: Therefore, our answer is
~athreyay