Solutions: Functions Practice Test
1. The relation is a function. 3. −16 5. The graph is a parabola and the graph fails the horizontal line test. 7. [latex]2{a}^{2}-a[/latex] 9. [latex]-2\left(a+b\right)+1[/latex] 11. [latex]\sqrt{2}[/latex] 13.
15. even
17. odd
19. x = –7 and x = 10
21. [latex]{f}^{-1}\left(x\right)=\frac{x+5}{3}[/latex]
23. [latex]\left(-\infty ,-1.1\right)\text{ and }\left(1.1,\infty \right)[/latex]
25. [latex]\left(1.1,-0.9\right)[/latex]
27. [latex]f\left(2\right)=2[/latex]
29. [latex]f\left(x\right)=\begin{cases}|x|\text{ if }x\le 2\\ 3\text{ if }x>2\end{cases}[/latex]
31. [latex]x=2[/latex]
33. yes
35. [latex]{f}^{-1}\left(x\right)=-\frac{x - 11}{2}[/latex]Licenses & Attributions
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- Precalculus. Provided by: OpenStax Authored by: Jay Abramson, et al.. Located at: https://openstax.org/books/precalculus/pages/1-introduction-to-functions. License: CC BY: Attribution. License terms: Download For Free at : http://cnx.org/contents/[email protected]..
