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Thread: Sequences Discrete Math

  1. #1
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    Question Sequences Discrete Math


    Answer requires justification, how would you do this?
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  2. #2
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    Re: Sequences Discrete Math

    Quote Originally Posted by inayat View Post

    Answer requires justification, how would you do this?
    You just post a list of questions and wait to be handed the answers.
    Well we want to be a help site. Therefore, we need to see work to know how to help.

    Here is f) $4^8-3^8$ Now you write a reply explaining that answer.
    Last edited by Plato; Feb 13th 2018 at 01:46 PM.
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    Unhappy Re: Sequences Discrete Math

    Quote Originally Posted by Plato View Post
    You just post a list of questions and wait to be handed the answers.
    Well we want to be a help site. Therefore, we need to see work to know how to help.

    Here is f) $4^8-3^8$ Now you write a reply explaining that answer.
    For part f), i got told number of sequences containing no A = 3^8

    Therefore 4^8-3^8 sequences contain at least one A

    Is this correct?
    Last edited by Plato; Feb 13th 2018 at 01:47 PM.
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    Re: Sequences Discrete Math

    Quote Originally Posted by inayat View Post
    For part f), i got told number of sequences containing no A = 3^8

    Therefore 4^8-3^8 sequences contain at least one A

    Is this correct?
    Correct! Now what about the others.
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  5. #5
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    Re: Sequences Discrete Math

    Quote Originally Posted by Plato View Post
    Correct! Now what about the others.
    For (a) i got 4^8 because i did number of sequences = 4 * 4* .... *4

    (b) 4^6

    (c) 4^7

    (d) 4^5

    (e) 4^6 + 4^7

    Please correct me where i'm wrong if i am
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  6. #6
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    Re: Sequences Discrete Math

    Quote Originally Posted by inayat View Post
    For (a) i got 4^8 because i did number of sequences = 4 * 4* .... *4

    (b) 4^6

    (c) 4^7

    (d) 4^5

    (e) 4^6 + 4^7 $\color{red}{\times}$

    Please correct me where i'm wrong if i am
    $\#(AB\text{ OR }D)=\#(AB)+\#(D)-\#(AB\text{ AND }D )$
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    Re: Sequences Discrete Math

    Quote Originally Posted by Plato View Post
    $\#(AB\text{ OR }D)=\#(AB)+\#(D)-\#(AB\text{ AND }D )$
    Sorry so would it be 4^6 + 4^7 - 4^5 ?
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  8. #8
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    Re: Sequences Discrete Math

    Quote Originally Posted by inayat View Post
    Sorry so would it be $4^6 + 4^7 - 4^5\large\color{blue}{\text{YES}}$ ?
    .....
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    Re: Sequences Discrete Math

    Quote Originally Posted by Plato View Post
    .....
    Thanks, do i need to work that solution out on a calculator or can i leave my final answer as that?
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  10. #10
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    Re: Sequences Discrete Math

    Quote Originally Posted by inayat View Post
    Sorry so would it be 4^6 + 4^7 - 4^5 ?
    Calculators are obsolete. Do you know about this website?
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    Re: Sequences Discrete Math

    Quote Originally Posted by Plato View Post
    Calculators are obsolete. Do you know about this website?
    No i didnt thanks for your help
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  12. #12
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    Re: Sequences Discrete Math

    Most computers come with a built in "calculator".
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