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Math Help - [SOLVED] Complex numbers

  1. #16
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    Quote Originally Posted by tonio View Post
    I am not adamant at nothing: I just liked the trick Hallsofivy introduced in his response [taking into account that z^5=1 . Just as I didn't check thorughly my work I didn't check his either, and after Plato intervened I did check it. There was only one 5z^4 lacking in Halls' work , and the way they put the answers in the GRE was very tricky ( I would even call it dirty ), no wonder Halls got confused:

    5z^4=5e^{8\pi i/4}=5e^{\pi i}e^{3\pi i/4}=-5e^{3\pi i/4}

    This is pretty easy, but when you have 170 minutes to solve 66 questions this can be way misleading...so misleading as to be considered unfair, perhaps.

    I still have to be explained, and convinced, what good is to have this kind of exams with those times....what do they REALLY check and evaluate.

    Tonio
    A lot of the questions in my opinion are garbage.
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