So this question is from the manga series, “Assassination Classroom”. The Japanese Roughly above given on the cyborg translates to: “Find the general solution for a[n] as defined in following recurrence-relation sequence.”
I’m not sure if something like that would count as a recurrence relation or if the vertical “=“ signs are actually quotations (“ “)
Anyway, a character “solves” the question and has written the solution (or at least, a trick) on a grenade.: a[n+1]/3[n+1] and a[n]/3[n]
So, can somebody help me interpret what the recurrence relation in the question is and what the steps are to finding the solution?