7/x+1/2x+2/3x

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Solution for 7/x+1/2x+2/3x equation: 


D( x )

x = 0

x = 0

x = 0

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

(1/2)*x+(2/3)*x+7/x = 0

7/6*x^1+7*x^-1 = 0

(7/6*x^2+7*x^0)/(x^1) = 0 // * x^2

x^1*(7/6*x^2+7*x^0) = 0

x^1

(7/6)*x^2+7 = 0

(7/6)*x^2+7 = 0

DELTA = 0^2-(4*7*(7/6))

DELTA = -98/3

DELTA < 0

x in { } 

x belongs to the empty set

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