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RE: Win SBD in this Math Contest #1 - Simplify:
another approach:
since you stated (ux)^2 = 1 = i^4
ux = i^2=-1
uxi = -i
because the question is rather confusing, I posted another approach for this
Just in case you're interested, I posted a hint today:
https://steemit.com/math/@point/update-and-hint-on-win-sbd-in-this-math-contest-1-simplify