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Find the norm of a vector

**v**in n-dimensional space. Use it to find a unit vector in the same direction as

**v**.

I was just hoping someone might be able to explain what exactly that means. I understand what a unit vector is but I'm a little hazy on the rest. Such as what exactly is a normal vector to another vector? Is that simply a vector that is perpendicular to the other? Any help would be awesome.