e^-1

  1. R

    Sigma for product of terms involving exponential

    Hi, Please be kind. First time user. I've got a formula as below. It describes the simple pharmokinetics of dosage and response. On day 1, there are no terms to sum. On day 2, there is one summation term. On day 3, there are two summation terms and so on. More weightage is provided to w(i)...

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