ラグランジュ乗数法の図解です．(powered by GeoGebra)

https://player.vimeo.com/video/808568890?h=7d6c0253e2&badge=0&autopause=0&player_id=0&app_id=58479

https://ttajika.github.io/nuce-slides/math-econ-text/Lagrange_movie.html