280/n=4

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Solution for 280/n=4 equation: 


D( n )

n = 0

n = 0

n = 0

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

280/n = 4 // - 4

280/n-4 = 0

280*n^-1 = 4 // : 280

n^-1 = 1/70

-1 < 0

1/(n^1) = 1/70 // * n^1

1 = 1/70*n^1 // : 1/70

70 = n^1

n = 70

n = 70

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