If 1,w,w^2 are the cube roots of unity , then find the value of
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Originally Posted by topsquark Hint: . (First of all, can you prove this?)
-Dan You mean ?
Originally Posted by math sucks You mean ? Ahem!
Um, yeah, what I wrote was kinda silly, wasn't it?
What I was trying to remember was this:
But thinking about it a bit further I see there is a simpler way:
So your expression becomes
Now note that