ƒ(X) = ||X||, XER¹. For X 0 and e any unit vector, show that Vef(X) = (X, e) ||X||

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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Let
ƒ(X) = ||X|, XER¹.
For X 0 and e any unit vector, show that
Vef(X) =
(X, e)
||X||
Transcribed Image Text:Let ƒ(X) = ||X|, XER¹. For X 0 and e any unit vector, show that Vef(X) = (X, e) ||X||
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