Difficult exponential equation

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The discussion centers on solving the exponential equation \(\frac{1}{20} = 0.5 e^{-0.877t} - 0.05 e^{-9.123t}\). Participants highlight the difficulty of isolating the variable \(t\) due to the nature of exponential functions. It is concluded that approximation methods, such as using Excel, may be necessary to find a solution, with an estimated value of \(t\) being slightly larger than 2.5. The conversation also touches on the properties of exponentials, indicating that factoring out \(e^t\) is not feasible in this case.

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zandria
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1. I need to solve the following exponential equation for t.

\frac{1}{20} =0.5 e^{-0.877t} - 0.05 e ^{-9.123t}
 
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i think you can take the t out and calculate the 0.5e things with eachohter inside parathensis and put the t outside. check my thread Hardest Math Problem EVAR! i had the same problem.
 
Unfortunately, due to the properties of exponentials, I don't think I can take the t out. If the exponents of the exponential were sums instead of products, the problem would be much easier and would allow me to factor out an e^t. But I'm not sure how to isolate the t in this specific equation.
 
Nothing obvious comes to my mind, so you might need to calculate t by an approximation method. For example, using Excel, the exponential expression on the right side of your equation equals .055819 when t is 2.5. The value you want is slightly larger than 2.5, I believe.

Note to EternityMech: There is no such word in English as "evar."
 
w00t?
 

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