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When you have an equation such as the one displayed in Equation 1 (see attached figure) and want to compute it by hand, you may rewrite it as Equation 2.

Setting X and Y to the following values:

X = Exp[-(n-1)/beta]

Y = Exp[-T/alpha]

I got Equation 3. Thereafter, I tried to transform it in the same way, and then I got Equation 4. However, Equation 3 and 4 are not the same. For alpha=360, beta=5, A1=10 and T=1, these two equations give very different curves, as you can see at the bottom of the image (Equation 3 represented as the purple curve, and Equation 4 represented as the blue line). What am I doing wrong?

Thanks in advance,

Estevão

P.S.: Please, I really need help in this issue.

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# What am I doing wrong?

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