1/2-4/n=-1/5

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Solution for 1/2-4/n=-1/5 equation: 


D( n )

n = 0

n = 0

n = 0

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

1/2-(4/n) = -1/5 // + -1/5

1/2-(4/n)-(-1/5) = 0

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

-4*n^-1 = -7/10 // : -4

n^-1 = 7/40

-1 < 0

1/(n^1) = 7/40 // * n^1

1 = 7/40*n^1 // : 7/40

40/7 = n^1

n = 40/7

n = 40/7

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