y 軸に平行な直線の方程式は不定で∞を返します。 ... Linear equation through P and QP(x1,y1), Q(x2,y2)y=ax+b=y2−y1x2−x1x+x2y1−x1y2x2−x1PQ=√(x2−x1)2+(y2 ...
確定! 回上一頁