Chapter 1: Problem 45
Apply the inverse properties of \(\ln x\) and \(e^{x}\) to simplify the given expression. $$ e^{\ln \sqrt{x}} $$
Chapter 1: Problem 45
Apply the inverse properties of \(\ln x\) and \(e^{x}\) to simplify the given expression. $$ e^{\ln \sqrt{x}} $$
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Get started for freeConsider the function \(f(x)=\frac{4}{1+2^{4 / x}}\) (a) What is the domain of the function? (b) Use a graphing utility to graph the function. (c) Determine \(\lim _{x \rightarrow 0^{-}} f(x)\) and \(\lim _{x \rightarrow 0^{+}} f(x)\). (d) Use your knowledge of the exponential function to explain the behavior of \(f\) near \(x=0\).
Average Speed On a trip of \(d\) miles to another city, a truck driver's average speed was \(x\) miles per hour. On the return trip. the average speed was \(y\) miles per hour. The average speed for the round trip was 50 miles per hour. (a) Verify that \(y=\frac{25 x}{x-25}\) What is the domain? (b) Complete the table. \begin{tabular}{|l|l|l|l|l|} \hline\(x\) & 30 & 40 & 50 & 60 \\ \hline\(y\) & & & & \\ \hline \end{tabular} Are the values of \(y\) different than you expected? Explain. (c) Find the limit of \(y\) as \(x \rightarrow 25^{+}\) and interpret its meaning.
In Exercises \(131-134,\) sketch the graph of the function. Use a graphing utility to verify your graph. $$ f(x)=\arcsin (x-1) $$
Verify that the Intermediate Value Theorem applies to the indicated interval and find the value of \(c\) guaranteed by the theorem. $$ f(x)=x^{2}+x-1, \quad[0,5], \quad f(c)=11 $$
Write the expression in algebraic form. \(\sin (\arccos x)\)
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