Does the answer for part (c) really have to be 0?

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SUMMARY

The discussion centers on the evaluation of part (c) of a mathematical problem involving vector fields and line integrals. The participant expresses skepticism about the answer being 0, based on their calculation using the curl of vector field F from part (a) and the differential dr. They suggest that the correct approach for part (c) requires performing the line integration around the closed path C, rather than solely relying on Stokes' Theorem.

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Differentiate1
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Here's my work typed in Microsoft Word:
http://i.imgur.com/jWPqBDh.png

I have trouble believing the answer is 0 for part c. All I did was use the curl of F from part a and dot it with dr which came out to be 0.
 
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Differentiate1 said:
Here's my work typed in Microsoft Word:
http://i.imgur.com/jWPqBDh.png

I have trouble believing the answer is 0 for part c. All I did was use the curl of F from part a and dot it with dr which came out to be 0.
I suspect that in part (c), you are expected to actually carry out the line integration around the closed path C , rather than using the theorem (Storke's Theorem).

(An image of you work follows.)
attachment.php?attachmentid=65036&stc=1&d=1387748676.png
 

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