Mathematical induction is connected by 'what you eliminated.' A self-made problem solving from recurrence relations to general terms and sums

You were able to solve the previous sub-question, but you don't know how to use that result in the next one. In problems with ...
Ars Technica

probability in recurrence relation

More specifically, a solution to the recurrence relation is a value that satisfies "if each child call terminates with probability t, the parent call terminates with probability t" but a solution to ...