MHB Logarithm inequality divide an inequality by a negative value

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The discussion centers on the error in handling logarithmic inequalities when dividing by a negative value. Specifically, it highlights that since \(\log_{10}\left(\frac{1}{2}\right)<0\), dividing the inequality by a negative number necessitates reversing the inequality direction. This leads to the conclusion that the correct interpretation results in \(2<3\). Understanding this principle is crucial for accurately solving logarithmic inequalities. Properly applying this rule prevents misinterpretation of results in mathematical expressions.
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The error arises because:

$$\log_{10}\left(\frac{1}{2}\right)<0$$

When we divide an inequality by a negative value, we need to reverse the direction of the inequality, so that we get:

$$2<3$$
 
I have been insisting to my statistics students that for probabilities, the rule is the number of significant figures is the number of digits past the leading zeros or leading nines. For example to give 4 significant figures for a probability: 0.000001234 and 0.99999991234 are the correct number of decimal places. That way the complementary probability can also be given to the same significant figures ( 0.999998766 and 0.00000008766 respectively). More generally if you have a value that...

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