Chapter 2: Problem 21
Find a function \(k\) such that \(k(m)\) is the number of kilometers in \(m\) miles.
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Chapter 2: Problem 21
Find a function \(k\) such that \(k(m)\) is the number of kilometers in \(m\) miles.
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Suppose \(r\) is the function with domain \((0, \infty)\) defined by $$ r(x)=\frac{1}{x^{4}+2 x^{3}+3 x^{2}} $$ for each positive number \(x\). (a) Find two distinct points on the graph of \(r\). (b) Explain why \(r\) is a decreasing function on \((0, \infty)\). (c) Find two distinct points on the graph of \(r^{-1}\).
Find the asymptotes of the graph of the given function \(\mathrm{r}\). $$ r(x)=\frac{9 x+5}{x^{2}-x-6} $$
Suppose \(p(x)=2 x^{5}+5 x^{4}+2 x^{3}-1 .\) Show that -1 is the only integer zero of \(p\).
Suppose \(t\) is a zero of the polynomial \(p\) defined by $$ p(x)=3 x^{5}+7 x^{4}+2 x+6 $$ Show that \(\frac{1}{t}\) is a zero of the polynomial \(q\) defined by $$ q(x)=3+7 x+2 x^{4}+6 x^{5} $$.
Write each expression as the sum of a polynomial and a rational function whose numerator has smaller degree than its denominator. $$ \frac{x^{6}+3 x^{3}+1}{x^{2}+2 x+5} $$
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