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Math Help - Problem of cumulative distribution

  1. #1
    kin
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    Problem of cumulative distribution


    i cant find the constant when i integrate the density function ...

    please show steps .............
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  2. #2
    MHF Contributor matheagle's Avatar
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    IS 0<x<1? If so, this is a Beta rv.

    AND why don't you show your 'steps'?
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  3. #3
    kin
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    Quote Originally Posted by matheagle View Post
    IS 0<x<1? If so, this is a Beta rv.

    AND why don't you show your 'steps'?
    the range is not given ......

    so i let the density function = K(1-x)^4 ,(where K is a constant)
    and integrate it from -∞ to ∞, which is supposed to be equal to 1.

    however, the result is undecisive after the integration,
    so i cant find the constant K....
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  4. #4
    MHF Contributor matheagle's Avatar
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    You need to know the support and I'd bet it's 0<x<1.
    The support is not all Reals.
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  5. #5
    kin
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    Quote Originally Posted by matheagle View Post
    You need to know the support and I'd bet it's 0<x<1.
    The support is not all Reals.

    if your guess is true , it will be simple...
    any reasons why u bet it's 0<x<1...?
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