Chapter 0: Problem 39
Use the vertical line test to determine whether the curve is the graph of a function of \(x\).
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Chapter 0: Problem 39
Use the vertical line test to determine whether the curve is the graph of a function of \(x\).
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Find the exact value of the given expression. $$ \cos \left(\sin ^{-1} \frac{1}{2}\right) $$
Find the inverse of \(f .\) Then use a graphing utility to plot the graphs of \(f\) and \(f^{-1}\) using the same viewing window. $$ f(x)=\frac{x}{\sqrt{x^{2}+1}}, \quad-1 \leq x \leq 1 $$
a. Show that if a function \(f\) is defined at \(-x\) whenever it is defined at
\(x\), then the function \(g\) defined by \(g(x)=f(x)+f(-x)\) is an even function
and the function \(h\) defined by \(h(x)=f(x)-f(-x)\) is an odd function.
b. Use the result of part (a) to show that any function \(f\) defined on an
interval \((-a, a)\) can be written as a sum of an even function and an odd
function.
c. Rewrite the function
$$
f(x)=\frac{x+1}{x-1} \quad-1
Show that the vertex of the parabola \(f(x)=a x^{2}+b x+c\) where \(a \neq 0\), is \((-b /(2 a), f(-b /(2 a)))\).
Find the inverse of \(f .\) Then sketch the graphs of \(f\) and \(f^{-1}\) on the same set of axes. $$ f(x)=x^{3 / 5}+1 $$
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