x/7-7/x=0

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Solution for x/7-7/x=0 equation: 


D( x )

x = 0

x = 0

x = 0

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

x/7-(7/x) = 0

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

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

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

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

x^1

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

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

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

DELTA = 4

DELTA > 0

x = (4^(1/2)+0)/(2*(1/7)) or x = (0-4^(1/2))/(2*(1/7))

x = 7 or x = -7

x in { -7, 7} 

x in { -7, 7 }

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