(7/n-4)+(7/4-n)

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Solution for (7/n-4)+(7/4-n) equation: 


D( n )

n = 0

n = 0

n = 0

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

7/n-n+7/4-4 = 0

7*n^-1-1*n^1-9/4*n^0 = 0

(7*n^0-1*n^2-9/4*n^1)/(n^1) = 0 // * n^2

n^1*(7*n^0-1*n^2-9/4*n^1) = 0

n^1

(-9/4)*n-n^2+7 = 0

(-9/4)*n-n^2+7 = 0

DELTA = (-9/4)^2-(-1*4*7)

DELTA = 529/16

DELTA > 0

n = ((529/16)^(1/2)-(-9/4))/(-1*2) or n = (-(-9/4)-(529/16)^(1/2))/(-1*2)

n = -4 or n = 7/4

n in { -4, 7/4} 

n in { -4, 7/4 }

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