4/(7-i)

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Solution for 4/(7-i) equation: 


D( i )

7-i = 0

7-i = 0

7-i = 0

7-i = 0 // - 7

-i = -7 // * -1

i = 7

i in (-oo:7) U (7:+oo)

4/(7-i) = 0

4 = 0

i belongs to the empty set

i belongs to the empty set

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