40/X=10/x

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Solution for 40/X=10/x equation: 


D( x )

x = 0

x = 0

x = 0

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

40/X = 10/x // - 10/x

40/X-(10/x) = 0

40/X-10*x^-1 = 0

-10*x^-1 = -(40*X^-1) // : -10

x^-1 = 4*X^-1

-1 < 0

1/(x^1) = 4*X^-1 // * x^1

1 = 4*X^-1*x^1 // : 4*X^-1

1/(4*X^-1) = x^1

x = 1/(4*X^-1)

x = 1/(4*X^-1)

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