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 Apr20 revised Integral of ln (3x) / x added 3 characters in body Apr20 accepted Integral of ln (3x) / x Apr20 asked Integral of ln (3x) / x Apr19 comment Determining half life without logs, given only reduction undergone and total time taken Yes it is ambiguous. The textbook used in this school is crazy. The teacher thought so as well. Apr19 accepted Determining half life without logs, given only reduction undergone and total time taken Apr19 comment Determining half life without logs, given only reduction undergone and total time taken I don't even see what you mean. What you're saying is right - the teacher said the same thing. But I don't understand this. I can recall 2^5 = 32 etc.. but can you please explain in words how is that related to the question. And what does 2^5 and 10/5 relate to in terms of the problem statement? For example, why divide 10 by 5? I can't make the connection. Apr19 asked Determining half life without logs, given only reduction undergone and total time taken Feb18 awarded Curious Feb17 accepted Explaining the non-application of the multiplication law of logarithms, when logs are in the denominators. Feb17 asked Explaining the non-application of the multiplication law of logarithms, when logs are in the denominators. Nov9 accepted Solving for x by completing the square in a problem where the solution doesn't seem to have symmetrical answers Nov5 asked Solving for x by completing the square in a problem where the solution doesn't seem to have symmetrical answers May8 comment Rescaling, or finding logarithmic equivalent of exponential functions This is the formula I'm actually working with: i.stack.imgur.com/f65Na.png As you can see, if we simplify all the $g_i(stuff)$ and just call it $g$, then this formula isn't exactly $e^x / (1 + e^x)$. It's more like $e^x / (1 + sum(different e^{g(x)s})$. And I'm thinking this isn't serving to properly normalize? Because it's possible that the $g(x)s$ end up negative... and so we might end up with something like $e^{-2} / ( 1 + e^{large number} )$, which may therefore produce a huge number...Am I right? I need the β values as coefficients to build weights for weighted least sq regression. May8 comment Rescaling, or finding logarithmic equivalent of exponential functions One more question - this function - the logistic function, is used for "normalization", right? May7 accepted Rescaling, or finding logarithmic equivalent of exponential functions May7 comment Rescaling, or finding logarithmic equivalent of exponential functions So does that mean that the functional values of expression $e^x / (1 + e^x)$ are likely to either be 0, or 1, or anywhere in between? May7 asked Rescaling, or finding logarithmic equivalent of exponential functions May2 asked Getting the upper and lower quartiles in data with an even number of observations, or where the quartile lands on a decimal number Feb20 comment Describing transformations using base vectors The question said: "Reflection in y-axis"... doesn't that mean a reflection along the line of x=0? Feb20 asked Describing transformations using base vectors