Calculus: Early Transcendentals
8th Edition
ISBN:9781285741550
Author:James Stewart
Publisher:James Stewart
Chapter1: Functions And Models
Section: Chapter Questions
Problem 1RCC: (a) What is a function? What are its domain and range? (b) What is the graph of a function? (c) How...
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Question
Find the directional derivative Du f(p) of the following function f
Transcribed Image Text:연습문제 13.4
1. 다음 함수 /의 방향도함수 D, /(P)을 구하여라.
(1) f(x, y) = x'y- y'x, P(2, -3), u =(-3/5, 4/5)
(2) S(x, y) = xIn (x+y'), P(2, 4), u (4/5, 3/5)
(3) f(x, y) = cos(x² -y'), P(/, R /2),
u= (1//2,-1//2)
(4) S(x, y) =- y
%3D
P(4, 5), u (/3/2, – 1/2)
%3D
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