Cylinders and Quadric Surfaces

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SUMMARY

The equation x^2 = 3y^2 + 5z^2 represents a quadric surface that can be classified as a cone. The standard form for a cone with an axis of symmetry along the x-axis is x^2/a^2 = y^2/b^2 + z^2/c^2. The original equation cannot be transformed into the standard form z^2/c^2 = x^2/a^2 + y^2/b^2, which is specific to cones with symmetry along the z-axis.

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Homework Statement



Consider the equation below.
x^2 = 3y^2 + 5z^2


Reduce the equation to one of the standard forms.


I believe its surface is a cone, but I'm not sure how to get it into the form

z^2/c^2 = x^2/a^2 + y^2/b^2


thanks!
 
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Your last equation is the standard form for a cone with axis of symmetry along the z axis. Your given equation has axis of symmetry along the x-axis and so cannot be put in exactly that form. It can, of course, be put in the form x^2/a^2= y^2/b^2+ z^2/c^2.
 

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