(a) Given that V= əx ə a i+ j+ -k. Show that V.VB=V²B where is a scalar ду əz (b) If M and N are differentiable vector functions in R³, prove that Vx (M+N) = VxM+VxN, hence or otherwise, find the unit vector of Vx (M+N), given that M =i+x cos(2z)j +xek and N=3zyi +4x³e²j+ln(xy²)k at (−1, 2, 0)

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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Question
ə
(a) Given that V=-
Əx
i +
д
ə
-j+ -k. Show that V.VB = V2B where ß is a scalar
dy
əz
(b) If M and N are differentiable vector functions in R³, prove that
Vx (M+N) = VxM+VxN, hence or otherwise, find the unit vector of Vx (M+N),
given that M = i+x cos(2z)j +xek and N=3zyi +4x³e²j+ln(xy²)k at (-1, 2, 0)
1+2y
Transcribed Image Text:ə (a) Given that V=- Əx i + д ə -j+ -k. Show that V.VB = V2B where ß is a scalar dy əz (b) If M and N are differentiable vector functions in R³, prove that Vx (M+N) = VxM+VxN, hence or otherwise, find the unit vector of Vx (M+N), given that M = i+x cos(2z)j +xek and N=3zyi +4x³e²j+ln(xy²)k at (-1, 2, 0) 1+2y
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