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10. Find the work done by the force field
F = 2xy i+ (x² – z²)j – 3xz²k
on a particle that travels from A(0,0,0) to B(2,1,3) along
a. the segment (1,0,0) to (1,1,0), then to (2,1,0) and then finally to (2,1,3).
b. the straight line (1,0,0) to (2,1,3).

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