3x-x^(1/2)

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Solution for 3x-x^(1/2) equation: 


D( x )

x < 0

x < 0

x in <0:+oo)

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

t_1 = x^(1/2)

3*t_1^2-1*t_1^1 = 0

3*t_1^2-t_1 = 0

DELTA = (-1)^2-(0*3*4)

DELTA = 1

DELTA > 0

t_1 = (1^(1/2)+1)/(2*3) or t_1 = (1-1^(1/2))/(2*3)

t_1 = 1/3 or t_1 = 0

t_1 = 0

x^(1/2)+0 = 0

x^(1/2) = 0

1*x^(1/2) = 0 // : 1

x^(1/2) = 0

x = 0

t_1 = 1/3

x^(1/2)-1/3 = 0

1*x^(1/2) = 1/3 // : 1

x^(1/2) = 1/3

x^(1/2) = 1/3 // ^ 2

x = 1/9

x in { 0, 1/9 }

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