圆的方程这块.
来源:学生作业帮 编辑:大师作文网作业帮 分类:数学作业 时间:2024/11/19 08:03:20
圆的方程这块.
解(1)[x-(t+3)]²+[y+(1-4t²)]²=-16t^4-9+(t+3)²+(1-4t²)²是圆则r²=-16t^4-9+(t+3)²+(1-4t²)²>0t²+6t+1-8t²>07t²-6t-1
再问: �����������⣿
再答: �ڶ�����Բ�ģ�(t+3)��(1-4t²)�뾶�������-16t^4-9+(t+3)²+(1-4t²)² �����ʣ��䷽�ã� (x-t-3)^2+(y+1-4t^2)^2=-7t^2+6t+1ΪԲ������R^2=F(t)=-7t^2+6t+1=-7(t-3/7)^2+16/7��t=3/7ʱ��R^2���Ϊ16/7 �����
再问: �����������⣿
再答: �ڶ�����Բ�ģ�(t+3)��(1-4t²)�뾶�������-16t^4-9+(t+3)²+(1-4t²)² �����ʣ��䷽�ã� (x-t-3)^2+(y+1-4t^2)^2=-7t^2+6t+1ΪԲ������R^2=F(t)=-7t^2+6t+1=-7(t-3/7)^2+16/7��t=3/7ʱ��R^2���Ϊ16/7 �����