9/7x-1/x

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Solution for 9/7x-1/x equation: 


D( x )

x = 0

x = 0

x = 0

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

(9/7)*x-(1/x) = 0

(9/7)*x-x^-1 = 0

9/7*x^1-1*x^-1 = 0

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

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

x^1

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

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

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

DELTA = 36/7

DELTA > 0

x = ((36/7)^(1/2)+0)/(2*(9/7)) or x = (0-(36/7)^(1/2))/(2*(9/7))

x = 7/18*(36/7)^(1/2) or x = 7/18*(36/7)^(1/2)

x in { 7/18*(36/7)^(1/2), 7/18*(36/7)^(1/2)} 

x in { 7/18*(36/7)^(1/2), 7/18*(36/7)^(1/2) }

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