2/5=4/n

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Solution for 2/5=4/n equation: 


D( n )

n = 0

n = 0

n = 0

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

2/5 = 4/n // - 4/n

2/5-(4/n) = 0

2/5-4*n^-1 = 0

-4*n^-1 = -2/5 // : -4

n^-1 = 1/10

-1 < 0

1/(n^1) = 1/10 // * n^1

1 = 1/10*n^1 // : 1/10

10 = n^1

n = 10

n = 10

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