Ellipse Formula ; e = √[(a 2 – b 2 )/a 2 ]. e = √[1-(b 2 /a 2 )] ; F1P + F2P = F1O + OP + F2P = c + a + (a–c) = 2a · F1Q + F2Q = √ (b 2 + c 2 ) + √ (b 2 + c ...
確定! 回上一頁