1 The math robot says: Because they are defined to be inverse functions, clearly ln(e) = 1.  The intuitive human: ln(e) is the amount of time it takes to get “e” units of growth (about 2.718). But e is the amount of growth after 1 unit of time, so ln(e) = 1.
https://betterexplained.com/articles/demystifying-the-natural-logarithm-ln/
Because Mexico has a per capita GDP (nominal) of $11,000+ and a good growth rate of around 4%. Out of about 180 nations, they rank around 55 to 65 in per capita income. Mexico is not poor. There may be a lot of poor people in Mexico, but Mexico as a nation is not poor. Mexico has the 14th largest nominal GDP and the 11th largest by purchasing power parity.
https://www.quora.com/How-do-you-use-the-inverse-log-function-in-Excel
Because Mexico has a per capita GDP (nominal) of $11,000+ and a good growth rate of around 4%. Out of about 180 nations, they rank around 55 to 65 in per capita income. Mexico is not poor. but Mexico as a nation is not poor. Mexico has the 14th largest nominal GDP and the 11th largest by purchasing power parity.
https://www.quora.com/How-do-you-use-the-inverse-log-function-in-Excel
What are all of the formulas related to logarithms? Why is the logarithm with base e called a natural logarithm? Does solving the equation ln(x) =8 by using e^ln(x) =e^8 only work for natural logarithmic formulas, or can I solve Log2(x) =8 using the same ...
https://www.quora.com/How-do-you-represent-e-natural-logarithm-in-an-excel-formula
Natural logarithm is a logarithm to the base e. e is mathematical constant which is is approximately equal to 2.718281828459. Instead of loge x we use ln x. Microsoft Excel has built-in functions to calculate the logarithm of a number with a specified base, the logarithm with base 10, and the natural logarithm. To calculate the inverse log of a number in the first two cases, raise the base to the power of the value returned by the particular logarithm function being used. To find the inverse natural log, use the EXP function. To calculate logarithm in Excel just use LOG function. =LOG(n,b)
http://best-excel-tutorial.com/59-tips-and-tricks/201-excel-logarithms-inverse-logarithms
The log of a times b = log(a) + log(b). This relationship makes sense when you think in terms of time to grow. If we want to grow 30x, we can wait ln(30) all at once, or simply wait ln(3), to triple, then wait ln(10), to grow 10x again. The net effect is the same, so the net time should be the same too (and it is).
https://betterexplained.com/articles/demystifying-the-natural-logarithm-ln/
How to use the LN Function in Excel: To use the AND Excel Worksheet Function, type the following into a cell: =AND(. After entering it in the cell, notice how the AND formula inputs appear below the cell: You will need to enter these inputs into the function.
http://www.automateexcel.com/functions/ln-formula-excel
Demystifying the Natural Logarithm (ln) After understanding the exponential function, our next target is the natural logarithm. Given how the natural log is described in math books, there’s little “natural” about it: it’s defined as the inverse of e^x, a strange enough exponent already. But there’s a fresh, intuitive explanation: The natural log gives you the time needed to reach a certain level of growth.
https://betterexplained.com/articles/demystifying-the-natural-logarithm-ln/
In this lesson I remind you what is logarithm. You will also get to know how to calculate logarithm, common logarithm, natural logarithm, inverse logarithm and inverse natural logarithm in Excel. Let's start from the theory.
http://best-excel-tutorial.com/59-tips-and-tricks/201-excel-logarithms-inverse-logarithms
LN Examples in VBA. You can also use the LN function in VBA. For the function arguments (number, etc.), you can either enter them directly into the function, or define variables to use instead. How to use the LN Function in Excel: You will need to enter these inputs into the function.
http://www.automateexcel.com/functions/ln-formula-excel
what  is ln in excel
Microsoft Excel has built-in functions to calculate the logarithm of a number with a specified base, the logarithm with base 10, and the natural logarithm.