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12. Determine an equation for the line that has the same x- and z-intercepts as the<br />

plane with equation 2x 5y z 7 0. Give your answer in vector,<br />

parametric, and symmetric form.<br />

13. Determine the vector, parametric, and Cartesian forms of the equation of the<br />

plane containing the lines L and<br />

! 1 : r ! 13, 4, 12 s11, 3, 52, sR,<br />

L 2 : r 2 17, 1, 02 t12, 6, 102, tR.<br />

14. Sketch each of the following planes:<br />

a. p 1 : 2x 3y 6z 12 0<br />

b. p 2 : 2x 3y 12 0<br />

c. p 3 : x 3z 6 0<br />

d. p 4 : y 2z 4 0<br />

e. p 5 : 2x 3y 6z 0<br />

15. Determine the vector, parametric, and Cartesian equations of each of the<br />

following planes:<br />

a. passing through the points and and parallel to the<br />

line with equation L : r ! P11,<br />

2ti ! 2, 52<br />

14t 32j ! Q13, 1, 22<br />

1t 12k ! , tR<br />

b. containing the point A11, 1, 22 and perpendicular to the line joining the<br />

points B12, 1, 62 and C12, 1, 52<br />

c. passing through the points 14, 1, 12 and 15, 2, 42 and parallel to the<br />

z-axis<br />

d. passing through the points 11, 3, 52, 12, 6, 42, and 13, 3, 32<br />

16. Show that s, and<br />

L 2 : r ! L 1 : r ! 11, 2, 32 s13, 5, 212 t10, 1, 32, tR,<br />

11, 1, 62 u11, 1, 12 v12, 5, 112, u, vR, are equations for<br />

the same plane.<br />

17. The two lines and<br />

L 2 : r ! L 1 : r ! 11, 1, 02 s12, 1, 12, sR,<br />

12, 1, 22 t12, 1, 12, tR, are parallel but do not coincide. The<br />

point A15, is on Determine the coordinates of a point B on such<br />

that AB ! 4, 32 L 1 .<br />

L 2<br />

is perpendicular to L 2 .<br />

18. Write a brief description of each plane.<br />

a. p 1 : 2x 3y 6<br />

b. p 2 : x 3z 6<br />

c. p 3 : 2y z 6<br />

19. a. Which of the following points lies on the line x 2t, y 3 t, z 1 t?<br />

A12, 4, 22<br />

B12, 2, 12<br />

C14, 5, 22<br />

D16, 6, 22<br />

b. If the point 1a, b, 32 lies on the line, determine the values of a and b.<br />

NEL<br />

CHAPTER 8 481

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