D88EC7E8-E3FB-4F6D-A2CE-00F7A1C48C48@1xCreated with sketchtool.

共有

[数学Ⅲ③複素数平面の実数倍・共役]ベクトルと同じやり方で出来ちゃう!

line
https://nico.ms/sm36711694?ref=thumb_watch