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Problem 56 Hard Difficulty

Given the force field $\mathbf{F},$ find the work required to move an object on the given oriented curve.
$\mathbf{F}=\frac{\langle x, y, z\rangle}{x^{2}+y^{2}+z^{2}}$ on the line segment from (1,1,1) to (8,4,2)

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