2026数学Ⅲβ 数学Ⅲβ【14】3乗根の差を1文字とみる ― x³＋3x−14＝0 へ (function(){ if (window.__hbMathJaxLoaded) return; window.__hbMathJaxLoaded = true; window.MathJax = { tex: { inlineMath: ], displayMath: ']] }, chtml: { scale:...
2026数学Ⅲβ 数学Ⅲβ【13】階段の上り方 ― 最後の1歩で場合分け (function(){ if (window.__hbMathJaxLoaded) return; window.__hbMathJaxLoaded = true; window.MathJax = { tex: { inlineMath: ], displayMath: ']] }, chtml: { scale:...
2026数学Ⅲβ 数学Ⅲβ【12】最大・最小は軸と範囲の左右 ― 相加相乗で仕上げる (function(){ if (window.__hbMathJaxLoaded) return; window.__hbMathJaxLoaded = true; window.MathJax = { tex: { inlineMath: ], displayMath: ']] }, chtml: { scale:...
2026数学Ⅲβ 数学Ⅲβ【11】正五角形は相似だらけ ― 黄金比と cos36° (function(){ if (window.__hbMathJaxLoaded) return; window.__hbMathJaxLoaded = true; window.MathJax = { tex: { inlineMath: ], displayMath: ']] }, chtml: { scale:...
2026数学Ⅲβ 数学Ⅲβ【10】放物線と円に接する直線 ― 判別式と点と直線の距離 (function(){ if (window.__hbMathJaxLoaded) return; window.__hbMathJaxLoaded = true; window.MathJax = { tex: { inlineMath: ], displayMath: ']] }, chtml: { scale:...
2026数学Ⅲβ 数学Ⅲβ【9】円の列から漸化式をつくる ― 直角三角形を1つ見つける (function(){ if (window.__hbMathJaxLoaded) return; window.__hbMathJaxLoaded = true; window.MathJax = { tex: { inlineMath: ], displayMath: ']] }, chtml: { scale:...
