MATH 251, Section Quiz 9 (Sections 14.1, 14.2). Thursday, Nov. 7, 2013

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MATH 251, Section
Thursday, Nov. 7, 2013
Quiz 9 (Sections 14.1, 14.2).
Dr. M. Vorobets
NAME (print):
No credit for unsupported answers will be given. Clearly indicate your final answer.
1. [2 pts.] Find the gradient vector field for the function
√
f (x, y, z) = x sin(y 2 + z 2 )
2. [4 pts.] Evaluate the line integral
R
C
xy 2 ds if C is the left half of the circle x2 + y 2 = 16.
3. [4 pts.] Find
0 ≤ t ≤ 1.
R
C
F~ · d~r if F~ = (y + z)~ı − x2~ − 4y 2~k and C is given by ~r(t) = t~ı − t3~ + 2t2~k,
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