4/84=1/n

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Solution for 4/84=1/n equation: 


D( n )

n = 0

n = 0

n = 0

n in (-oo:0) U (0:+oo)

4/84 = 1/n // - 1/n

4/84-(1/n) = 0

4/84-n^-1 = 0

-1*n^-1 = -1/21 // : -1

n^-1 = 1/21

-1 < 0

1/(n^1) = 1/21 // * n^1

1 = 1/21*n^1 // : 1/21

21 = n^1

n = 21

n = 21

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