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\frac{3i}{7i^{2}}
Multiply both numerator and denominator by imaginary unit i.
\frac{3i}{-7}
By definition, i^{2} is -1. Calculate the denominator.
-\frac{3}{7}i
Divide 3i by -7 to get -\frac{3}{7}i.
Re(\frac{3i}{7i^{2}})
Multiply both numerator and denominator of \frac{3}{7i} by imaginary unit i.
Re(\frac{3i}{-7})
By definition, i^{2} is -1. Calculate the denominator.
Re(-\frac{3}{7}i)
Divide 3i by -7 to get -\frac{3}{7}i.
0
The real part of -\frac{3}{7}i is 0.