The recurrence formula gacha is a service released on July 21, 2020 on the delicious mathematics site that randomly asks 3 recurrence formula problems up to Mathematics IIB, inheriting the functions of the web version and further enhancing it. It will be the updated application version.
This app version has the following features in addition to the web version.

(1) More problems than the web version, currently 31349 gacha combinations (20102 in the web version)
②Unlimited gacha rotation, no time limit
3. Equipped with a timer (it can measure up to 100 minutes after turning the gacha, and can be used for time attacks)
④ New question judgment function (you can distinguish whether it is a new question or an existing question)
⑤ Calculation paper function
⑥ List of all emission problems from beginner to advanced (you can also see problems added to the web version)

If you are a beginner, please search Google for "recurrence formula gacha" and use the web version in delicious mathematics for free and experience it.
Please search for "revolutionary gacha" on Twitter.