Re: Re: Conic Sections and Quadric Surfaces
- To: mathgroup@smc.vnet.net
- Subject: [mg11162] Re: [mg11088] Re: Conic Sections and Quadric Surfaces
- From: Carlo Infante <cinfante@worldnet.att.net>
- Date: Mon, 23 Feb 1998 21:41:23 -0500
Does writing the equation for the ellipse in parametric form help?
Carlo Infante
===================================
>> Ref: Introduction to Linear Algebra- 4th ed. Johnson,Riess and Arnold
>> (page 35)
>>
>> Find the equation of the conic section passing through the five points
>> (-1,0),(0,1),(2,2),(1,-1), (0,-3). Display the graph of the conic.
>>
>> When I try to set up the augmented matrix I get two (2) indeterminate
>> rows which
>> prevents my proceeding with the method outlined in the textbook Linear
>> Algebra with Mathematica by E. Johnson page 58 to 59. How can I get
>> around this?The equation to satisfy (an ellipse) is ax^2 + bxy + cy^2 +
>> dx + ey + f =0. Is there some other technique I can use to find the
>> equation given sevral points?
>> I am presently playing around with Fit[ data,{etc}] but I only know how
>> to fit quadratics. Thank you in advance.
>> Manuel Avalos
>> MAvalosjr@aol.com
Carlo Infante
cinfante@worldnet.att.net