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There are 3 complex numbers $a+bi$, $c+di$, and $e+fi$. If $b=3$, $e=-a-c$, and the sum of the numbers is $2i$, find $d+f$.

 Feb 21, 2021
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The sum of the numbers is 2i:

 

\(b+d+f = 2\)

 

\(d + f = \boxed{-1}\)

 Feb 21, 2021

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