Chapter 3: Problem 94
Give the coordinates of three distinct points on the graph of the function \(f\) defined by \(f(x)=\log _{3} x\).
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Chapter 3: Problem 94
Give the coordinates of three distinct points on the graph of the function \(f\) defined by \(f(x)=\log _{3} x\).
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At current growth rates, the Earth's population is doubling about every 69 years. If this growth rate were to continue, about how many years will it take for the Earth's population to become one-fourth larger than the current level?
Show that cosh is an even function.
Show that \(\cosh x \geq 1\) for every real number \(x\).
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.
Show that the range of cosh is the interval \([1, \infty)\).
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