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Math Forums @ Math Goodies - show e ^ln x = x not graphically

Another approach: Let's look at e^ln 10 ln 10 means the power of 'e' required to give 10. That power is 2.302585.. So e^ln 10 = e^2.302585.. = 10. Similarly e^ln 5 = e^1.609437.. = 5 e^ln x ln x is the power of 'e' that will give 'x' Call that power 'k' e...

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