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Math Help - Find the pdf from the cdf

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    Find the pdf from the cdf

    At the points x = 0, 1,..., 6, the cdf for the discrete random variable X has the value Fx(x) = x(x +1)/42. Find the pdf for X.
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    Quote Originally Posted by donald17 View Post
    At the points x = 0, 1,..., 6, the cdf for the discrete random variable X has the value Fx(x) = x(x +1)/42. Find the pdf for X.
    The pdf is f(x)=F_X(x)-F_X(x-1);~x=1,2,\cdots,6.
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