Question 26
$a_n$ is the last digit of $[10^{n / 2}]$. Is the sequence $a_n$ periodic?
$b_n$ is the last digit of $[2^{n / 2}]$. Is the sequence $b_n$ periodic?
$b_n$ is the last digit of $[2^{n / 2}]$. Is the sequence $b_n$ periodic?
MathNet 1983 — Part 01 Question 26
Math Olympiad Vault · MathNet 1983 — Part 01