7/d+2d/3

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Solution for 7/d+2d/3 equation: 


D( d )

d = 0

d = 0

d = 0

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

(2*d)/3+7/d = 0

2/3*d^1+7*d^-1 = 0

(2/3*d^2+7*d^0)/(d^1) = 0 // * d^2

d^1*(2/3*d^2+7*d^0) = 0

d^1

(2/3)*d^2+7 = 0

(2/3)*d^2+7 = 0

DELTA = 0^2-(4*7*(2/3))

DELTA = -56/3

DELTA < 0

d in { } 

d belongs to the empty set

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