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D( x )
x < 0
x = 0
x < 0
x = 0
x = 0
x in (0:+oo)
x^(-14/3)-x^(-9/2) = 0
x^(-14/3)-x^(-9/2) = 0
x^(-9/2)*(x^(-1/6)-1) = 0
1*x^(-1/6) = 1 // : 1
x^(-1/6) = 1
-1/6 < 0
1/(x^(1/6)) = 1 // * x^(1/6)
1 = 1*x^(1/6) // : 1
1 = x^(1/6)
x^(1/6) = 1 // ^ 6
x = 1
1/(x^(9/2)) = 0
1*x^(-9/2) = 0 // : 1
x^(-9/2) = 0
x należy do O
x = 1
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