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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
12/65.4 = 24/x // - 24/x
12/65.4-(24/x) = 0
12/65.4-24*x^-1 = 0
-24*x^-1 = -0.18348624 // : -24
x^-1 = 0.00764526
-1 < 0
1/(x^1) = 0.00764526 // * x^1
1 = 0.00764526*x^1 // : 0.00764526
130.79999895 = x^1
x = 130.79999895
x = 130.79999895
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