7/n-8/n-9/2

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Solution for 7/n-8/n-9/2 equation: 


D( n )

n = 0

n = 0

n = 0

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

7/n-(8/n)-(9/2) = 0

7/n-8*n^-1-9/2 = 0

-1*n^-1 = 9/2 // : -1

n^-1 = -9/2

-1 < 0

1/(n^1) = -9/2 // * n^1

1 = -9/2*n^1 // : -9/2

-2/9 = n^1

n = -2/9

n = -2/9

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