00 \, nC$, $q_2 = -3.00 \, nC$, and $q_3 = 5.00 \, nC$.
The distance between $q_1$ and the origin is $r_1 = 0.300 \, m$.
The distance between $q_2$ and the origin is $r_2 = 0.100 \, m$.
The electric field due to $q_1$ at the origin is:
$\vec{E}_1 =
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