A positron undergoes a displacement LaTeX: \nabla\vec{r}=\:2.0\hat i - 3.0 \hat j + 6.0 \hat k,∇ r → = 2.0 i ^ − 3.0 j ^ + 6.0 k ^ , ending with the position vector LaTeX: \vec{r}=3.0 \hat i - 4.0 \hat k,r → = 3.0 i ^ − 4.0 k ^ , in meters. What was the positron’s initial position vector?

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