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Thread: Sequences (Discrete Math) of length 8 whose elements come from {A, B, C, D}

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    Sequences (Discrete Math) of length 8 whose elements come from {A, B, C, D}


    Answer requires justification, how would you do this?

  2. #2
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    Quote Originally Posted by sita View Post

    Answer requires justification, how would you do this?
    Typically, one counts. For each part of the question, ask 8 sub questions:
    Which element(s) can appear in the first character of such a sequence?
    Which element(s) can appear in the second character of such a sequence?
    etc...
    Which element(s) can appear in the eighths character of such a sequence?

    There may be some variation in these questions for parts that include "or" or "at least".
    "Unique Answers Don't Care How You Find Them." - Many may have said it, but I hear it most from me.

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