9x^(-1/2)=1

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Solution for 9x^(-1/2)=1 equation: 


D( x )

x < 0

x = 0

x < 0

x = 0

x = 0

x in (0:+oo)

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

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

9*x^(-1/2) = 1 // : 9

x^(-1/2) = 1/9

-1/2 < 0

1/(x^(1/2)) = 1/9 // * x^(1/2)

1 = 1/9*x^(1/2) // : 1/9

9 = x^(1/2)

x^(1/2) = 9 // ^ 2

x = 81

x = 81

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