-4/n=20

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Solution for -4/n=20 equation: 


D( n )

n = 0

n = 0

n = 0

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

-4/n = 20 // - 20

-4/n-20 = 0

-4*n^-1 = 20 // : -4

n^-1 = -5

-1 < 0

1/(n^1) = -5 // * n^1

1 = -5*n^1 // : -5

-1/5 = n^1

n = -1/5

n = -1/5

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