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D( x )
4*(6-x)^(3/2) = 0
(6-x)^0.5 = 0
6-x < 0
4*(6-x)^(3/2) = 0
4*(6-x)^(3/2) = 0
6-x = 0 // - 6
-x = -6 // * -1
x = 6
(6-x)^0.5 = 0
(6-x)^0.5 = 0
6-x = 0 // - 6
-x = -6 // * -1
x = 6
6-x < 0
6-x < 0
6-x < 0
-x < -6 // * -1
x > 6
x in (-oo:6)
-x/(4*(6-x)^(3/2))-(1/((6-x)^0.5)) = 0
-x/(4*(6-x)^(3/2))-(6-x)^-0.5 = 0
-x/(4*(6-x)^(3/2))-1/((6-x)^0.5) = 0
(-1*4*(6-x))/(4*(6-x)^(3/2))-x/(4*(6-x)^(3/2)) = 0
-1*4*(6-x)-x = 0
3*x-24 = 0
(3*x-24)/(4*(6-x)^(3/2)) = 0
(3*x-24)/(4*(6-x)^(3/2)) = 0 // * 4*(6-x)^(3/2)
3*x-24 = 0
3*x-24 = 0 // + 24
3*x = 24 // : 3
x = 24/3
x = 8
x in { 8}
x belongs to the empty set
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