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Compute the magnitude of oversetrarrc=1/...

Compute the magnitude of `oversetrarrc=1/sqrt3 overset^^i+1/sqrt3 overset^^j -1/sqrt3 overset^^k`vector

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`|vecc|=sqrt((1/sqrt3)^2+(1/sqrt3)^2+((-1)/sqrt3)^2)`
`sqrt(1/3+1/3+1/3)=sqrt1=1`
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