8. Consider the surface S of equation z²-2x² + y²-x= 0 and let P (2, 3, 1) be a point at S. Suppose z is an implicit function of x and y in a neighborhood of point P. Consider the following statements: III. The vector Vz (P) is unitary. Is this true or false?

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
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8) Answer the question shown in the image 

8. Consider the surface S of equation z2-2x? + y²-x= 0 and let
P (2, 3, 1) be a point at S. Suppose z is an implicit function
of x and y in a neighborhood of point P. Consider the
following statements:
II. The vector Vz (P) is unitary.
Is this true or false?
Transcribed Image Text:8. Consider the surface S of equation z2-2x? + y²-x= 0 and let P (2, 3, 1) be a point at S. Suppose z is an implicit function of x and y in a neighborhood of point P. Consider the following statements: II. The vector Vz (P) is unitary. Is this true or false?
Expert Solution
Step 1

In this question, concept of gradient is used.

Gradient

A scalar field's gradient may be a vector field whose magnitude is that the rate of change and which points within the direction of the scalar field's greatest rate of rise. If the vector is resolved, the components of the vector describe the scalar field's rate of change with regard to each directional component.

Gradient of field fx,y,z=<fx,fy,fz>

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