# The expression as a limit for the directional derivative of f at ( x 0 , y 0 ) in the direction of a unit vector u = 〈 a , b 〉 . Interpret its rate of change. Also interpret it geometrically.

### Essential Calculus: Early Transcen...

2nd Edition
James Stewart
Publisher: Cengage Learning
ISBN: 9781133112280

### Essential Calculus: Early Transcen...

2nd Edition
James Stewart
Publisher: Cengage Learning
ISBN: 9781133112280

#### Solutions

Chapter 11, Problem 13RCC

(a)

To determine

## To write: The expression as a limit for the directional derivative of f at (x0,y0) in the direction of a unit vector u=〈a,b〉 . Interpret its rate of change. Also interpret it geometrically.

(b)

To determine

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