漸化式ガチャ

Akira Hiraoka

About this app

The Recurrence Formula Gacha is a service released on the Oishii Mathematics website on July 21, 2020, that randomly presents three recurrence formula problems up to Mathematics II BC. This app inherits the functionality of the web version and is an enhanced version.

The app version has the following features in addition to the web version:

1. More problems than the web version, with 49,590 possible gacha combinations (18,620 in the web version).
2. Unlimited gacha spins, no time limit.
3. Advanced-only switch ((3) ensures an advanced level is drawn).
4. Additional information included (contains relevant information such as background knowledge and sources for the problem).
5. Built-in timer (measures up to 100 minutes after spinning the gacha, useful for time attack).
6. New problem identification function (distinguishes between new and previously-released problems).
7. Marking function (allows you to mark problems you answered correctly).
8. No ads.
9. List of all problems from beginner to advanced (including problems added to the web version)
10. Link to the Oishii Mathematics recurrence formula page, improved for the app (even those new to recurrence formulas can start from scratch)
11. Calculation sheet function (simple)

First-time users can try out the free web version of Oishii Mathematics by searching "recurrence formula gacha" on Google.
You can also search for "recurrence formula gacha" on X (Twitter).