Pleased the video is awesome and well explained.. but there is one thing that I didn't get, so where does this minus go before the e? check (14:53). and thanks again for your work!
Hi, it seems like I didn't elaborate on it. -(-1)^k is the same as (-1)^k, just opposite k's for which it gives the same result, in this instance. So in the end the result is the same.
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