Chapter 12.6, Problem 18E

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8th Edition

James Stewart

ISBN: 9781305266643

Textbook Problem

Use traces to sketch and identify the surface.

3*x*^{2} − *y*^{2} + 3*z*^{2} = 0

To determine

**To identify**: The given surface equation and sketch it.

Explanation

**Given data:**

Surface equation is

**Formula used:**

Consider the standard equation of circular cone along the *y* axis.

Consider the given surface equation.

Rearrange the equation.

By comparing equation (3) with (1), the given surface equation satisfies the equation of a circular cone along the *y*-axis.

Thus, the surface equation
*y*-axis.

Find *a*, *b*, and *c* by comparing equation (3) with equation (1).

The value of *a* is

The value of *b* is

The value of *c* is

**Case i:**

Let

Substitute *k* for *x* in equation (2),

Modify equation (4) for

So, the surface equation (4) has two intersecting line equations for

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