261E1-S08

# 261E1-S08 - MA 261 EXAM 1 Form A Spring 2008 Answer Key...

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Unformatted text preview: MA 261 EXAM 1 Form A Spring 2008 Answer Key: DCAC DADB ECBB 1. Find all values of x so that the vectors a = ( x,- 3 , 1), b = ( x, x, 2) are perpendicular. The correct values of x are A. 0 , 1 B.- 1 , 2 C. 1 , 1 D. 1 , 2 E. 2 , 2 2. Determine a so that the line x- 3 7 = y + 5 a = z + 1 4 is parallel to the plane 2 x + 3 y- 5 z = 10 . The correct choice of a is A. 1 B. 3 C. 2 D.- 2 E.- 1 3. Determine a so that the lines x = a + t , y =- 3 + 2 t , z = t and x = 1 + s , y = 2- s , z = 2 s intersect. The correct choice of a is A. 0 B. 1 C.- 1 D. 2 E.- 2 1 MA 261 EXAM 1 Form A Spring 2008 4. The equation of the plane perpendicular to the line x- 1- 2 = y- 1 3 = z and containing the point (1 , 1 , 1) is A. x + y- z = 1 B. 2 x- 3 y + z = 0 C.- 2 x + 3 y + z = 2 D. 2 x + 3 y- z = 4 E. 3 x- 2 y + z = 2 5. The surface whose equation in spherical coordinates is φ = π represents A. a plane B. a cone with axis the z-axis C. the xy plane D. the negative z axis E. the z axis 6. Let L be the line tangent to the curve...
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## This note was uploaded on 04/09/2008 for the course MA 261 taught by Professor Stefanov during the Fall '08 term at Purdue.

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261E1-S08 - MA 261 EXAM 1 Form A Spring 2008 Answer Key...

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