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#2




Why would you want this, when the variance of the adoubledot(m) random variable looks just like the formula for the variance when m = 1, except you put a superscript m on every term?
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#4




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When you say you are given "the second moment of adouble dot", do you really mean the second moment? I suspect that you mean that you are given doubleforce adouble dot, which is quite different, from which you can easily get doubleforce A. And are you given these for annual annuities or mthly annuities? I need to know exactly what you're given. Perhaps you could state the problem precisely.
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