4/(2-i)

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Solution for 4/(2-i) equation: 


D( i )

2-i = 0

2-i = 0

2-i = 0

2-i = 0 // - 2

-i = -2 // * -1

i = 2

i in (-oo:2) U (2:+oo)

4/(2-i) = 0

4 = 0

i belongs to the empty set

i belongs to the empty set

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