【数B】focus例題331 前半

https://twitter.com/norinoriadg/status/1286766896642011136
https://twitter.com/norinoriadg/status/1286766896642011136
https://twitter.com/norinoriadg/status/1286766804203745280
https://twitter.com/norinoriadg/status/1286766761413509121
https://twitter.com/norinoriadg/status/1286766517124702208
https://twitter.com/Yu_na_trip_ace_/status/1286148218271576068
https://twitter.com/doi_m2000/status/1285879284578398208
https://twitter.com/norinoriadg/status/1285834483439001600

https://t.co/jpt3Lxrf66のK.B focus嬉しい💗

— あっちん。 (@acchin_ka48) July 19, 2020

https://twitter.com/KB_ADDICTION_/status/1284824569149194240