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２次関数のグラフ（軸が動く、上に凸）
Author:
tsuchidamath
GeoGebra
New Resources
小テスト
斜めドップラー
standingwave-reflection
接点の作る円は内接円
sine-wave
Discover Resources
螺旋 (helix)
放物面鏡の鏡像 Mirror of a paraboloid
cosθの三角不等式
sin cos tan & Ferris wheel
No,40-問３
Discover Topics
Straight Lines
Means
Confidence Interval
Surface
Constructions