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Hi, this is not really a homework problem, but something that came up during my research, upon trying to integrate some empirical function. This function consists of many terms, but specifically, there is a term containing double exponential functions which is giving me some trouble.
If anyone could please assist in helping me with this problem my appreciation would approach infinity :)
I want to compute the integral of an empirical relation with respect to x, which I will refer to as y. Here here a, b and c are constant and x>0.
\begin{equation} y = \int_{x_1}^{x_2} \frac{e^{-ax}}{e^{b+e^{-cx}}} dx \end{equation}
By using the properties of exponential functions, I simplify the relation:
\begin{equation} y = \int_{x_1}^{x_2} e^{-ax}e^{-b} e^{-e^{-cx}} dx \end{equation}
I have become aware that if a = c, i could make the substitution:
\begin{equation} u = e^{-ax} \end{equation}
and it would be possible to obtain an analytical solution, however this is not the case and I have become stuck in trying to solve this problem. I have also used Mathematica & Matlab to try and obtain symbolic solutions, however both these packages fail (I realize this is hardly an substitution to using analysis, but I was examining different avenues).
Is it perhaps that an analytical solution does not exists? I have plotted the function and it is continuous and reasonably I expected an analytical integral to be possible. Please assist.
If anyone could please assist in helping me with this problem my appreciation would approach infinity :)
Homework Statement
I want to compute the integral of an empirical relation with respect to x, which I will refer to as y. Here here a, b and c are constant and x>0.
Homework Equations
\begin{equation} y = \int_{x_1}^{x_2} \frac{e^{-ax}}{e^{b+e^{-cx}}} dx \end{equation}
The Attempt at a Solution
By using the properties of exponential functions, I simplify the relation:
\begin{equation} y = \int_{x_1}^{x_2} e^{-ax}e^{-b} e^{-e^{-cx}} dx \end{equation}
I have become aware that if a = c, i could make the substitution:
\begin{equation} u = e^{-ax} \end{equation}
and it would be possible to obtain an analytical solution, however this is not the case and I have become stuck in trying to solve this problem. I have also used Mathematica & Matlab to try and obtain symbolic solutions, however both these packages fail (I realize this is hardly an substitution to using analysis, but I was examining different avenues).
Is it perhaps that an analytical solution does not exists? I have plotted the function and it is continuous and reasonably I expected an analytical integral to be possible. Please assist.