Chapter 3: Problem 20
Evaluate the indicated expression. Do not use a calculator for these exercises. $$ \log \frac{1}{\sqrt{10000}} $$
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Chapter 3: Problem 20
Evaluate the indicated expression. Do not use a calculator for these exercises. $$ \log \frac{1}{\sqrt{10000}} $$
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Show that for every positive number \(c,\) we have $$ \ln (c+t)-\ln c \approx \frac{t}{c} $$ for small values of \(t\).
Find a number \(r\) such that $$ \left(1+\frac{r}{10^{75}}\right)^{\left(10^{75}\right)} \approx 4 $$
Estimate the indicated value without using a calculator. \(\left(\frac{e^{8.0002}}{e^{8}}\right)^{3}\)
What is wrong with the following apparent paradox: You have two parents, four grandparents, eight greatgrandparents, and so in. Going back \(n\) generations, you should have \(2^{n}\) ancestors. Assuming three generations per century, if we go back 2000 years (which equals 20 centuries and thus 60 generations), then you should have \(2^{60}\) ancestors from 2000 years ago. However, \(2^{60}=\left(2^{10}\right)^{6} \approx\left(10^{3}\right)^{6}=10^{18},\) which equals a billion billion, which is far more than the total number of people who have ever lived.
Find all numbers \(x\) that satisfy the given equation. \(\frac{\ln (12 x)}{\ln (5 x)}=2\)
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