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Math Help - eignenvalue/trace

  1. #1
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    eignenvalue/trace

    if a\in R n*n s.t. a^2=I

    find all possible values of an eigenvalue \lambdaof a (without using characteristic polynomial)

    show tr(a)=n \Rightarrowa=I

    any suggestions, im really stuck anything would help
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  2. #2
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    wow i really dont know how to type these questions either i hope this makes some sense at least
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  3. #3
    MHF Contributor FernandoRevilla's Avatar
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