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D( X )
X < 0
X < 0
X in <0:+oo)
X^47.2 = 18/108 // - 18/108
X^47.2-(18/108) = 0
X^47.2-1/6 = 0
1*X^47.2 = 1/6 // : 1
X^47.2 = 1/6
X^47 = (1/6)^(1/0.2) // ^ 1/47
X = (1/7776)^(1/47)
X = (1/7776)^(1/47)
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