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D( x )
x < 0
x < 0
x in <0:+oo)
3*x-x^(3/2) = 0
3*x-x^(3/2) = 0
x*(3-x^(1/2)) = 0
-1*x^(1/2) = -3 // : -1
x^(1/2) = 3
( 3 < 0 i 1/2 in (0:1) ) => x należy do O
x = 0
x = 0
x = 0
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