9/n-4/5

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Solution for 9/n-4/5 equation: 


D( n )

n = 0

n = 0

n = 0

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

9/n-(4/5) = 0

9/n-4/5 = 0

9*n^-1 = 4/5 // : 9

n^-1 = 4/45

-1 < 0

1/(n^1) = 4/45 // * n^1

1 = 4/45*n^1 // : 4/45

45/4 = n^1

n = 45/4

n = 45/4

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