3/(4+i) - solution

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Solution for 3/(4+i) equation:

D( i )

i+4 = 0

i+4 = 0

i+4 = 0

i+4 = 0 // - 4

i = -4

i in (-oo:-4) U (-4:+oo)

3/(i+4) = 0

i belongs to the empty set

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