If r=xi-yj+zk and r= r|, prove that for differentiable function f(r) d'f 2 df show that vifr) = dr and hence find f(r) such that V?f(r)=0. r dr

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
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Chapter2: Second-order Linear Odes
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If r=xi - yj+ zk and r= |r|, prove that for differentiable function f(r)
4C.
show that Vifr) =
dr
d'f 2 df
and hence find f(r) such that V?f{r)=0.
r dr
Transcribed Image Text:If r=xi - yj+ zk and r= |r|, prove that for differentiable function f(r) 4C. show that Vifr) = dr d'f 2 df and hence find f(r) such that V?f{r)=0. r dr
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