ABCD是平行四边形,A(A,1/A),B(-B,1/B),C(-A,1/A),D(B,-1/B)
AC的方程:X-A^2=0,B到AC的距离为(B+A^2/B)/SQUT(1+A^4).B=A时有最小值(A看成常数).
ABCD是平行四边形,A(A,1/A),B(-B,1/B),C(-A,1/A),D(B,-1/B)
AC的方程:X-A^2=0,B到AC的距离为(B+A^2/B)/SQUT(1+A^4).B=A时有最小值(A看成常数).
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