Solutions
Solutions to Try Its
1. ellipse; [latex]e=\frac{1}{3};x=-2[/latex] 2.![](https://s3-us-west-2.amazonaws.com/courses-images-archive-read-only/wp-content/uploads/sites/924/2015/11/25202443/CNX_Precalc_Figure_10_05_0092.jpg)
Solutions to Odd-Numbered Exercises
1. If eccentricity is less than 1, it is an ellipse. If eccentricity is equal to 1, it is a parabola. If eccentricity is greater than 1, it is a hyperbola. 3. The directrix will be parallel to the polar axis. 5. One of the foci will be located at the origin. 7. Parabola with [latex]e=1[/latex] and directrix [latex]\frac{3}{4}[/latex] units below the pole. 9. Hyperbola with [latex]e=2[/latex] and directrix [latex]\frac{5}{2}[/latex] units above the pole. 11. Parabola with [latex]e=1[/latex] and directrix [latex]\frac{3}{10}[/latex] units to the right of the pole. 13. Ellipse with [latex]e=\frac{2}{7}[/latex] and directrix [latex]2[/latex] units to the right of the pole. 15. Hyperbola with [latex]e=\frac{5}{3}[/latex] and directrix [latex]\frac{11}{5}[/latex] units above the pole. 17. Hyperbola with [latex]e=\frac{8}{7}[/latex] and directrix [latex]\frac{7}{8}[/latex] units to the right of the pole. 19. [latex]25{x}^{2}+16{y}^{2}-12y - 4=0[/latex] 21. [latex]21{x}^{2}-4{y}^{2}-30x+9=0[/latex] 23. [latex]64{y}^{2}=48x+9[/latex] 25. [latex]96{y}^{2}-25{x}^{2}+110y+25=0[/latex] 27. [latex]3{x}^{2}+4{y}^{2}-2x - 1=0[/latex] 29. [latex]5{x}^{2}+9{y}^{2}-24x - 36=0[/latex] 31.![](https://s3-us-west-2.amazonaws.com/courses-images-archive-read-only/wp-content/uploads/sites/924/2015/11/25202444/CNX_Precalc_Figure_10_05_2012.jpg)
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![](https://s3-us-west-2.amazonaws.com/courses-images-archive-read-only/wp-content/uploads/sites/924/2015/11/25202447/CNX_Precalc_Figure_10_05_2052.jpg)
![](https://s3-us-west-2.amazonaws.com/courses-images-archive-read-only/wp-content/uploads/sites/924/2015/11/25202448/CNX_Precalc_Figure_10_05_2072.jpg)
![](https://s3-us-west-2.amazonaws.com/courses-images-archive-read-only/wp-content/uploads/sites/924/2015/11/25202449/CNX_Precalc_Figure_10_05_2092.jpg)
![](https://s3-us-west-2.amazonaws.com/courses-images-archive-read-only/wp-content/uploads/sites/924/2015/11/25202451/CNX_Precalc_Figure_10_05_2112.jpg)