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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
16762.38/x = 63.4/100 // - 63.4/100
16762.38/x-(63.4/100) = 0
16762.38/x-0.634 = 0
16762.38*x^-1 = 0.634 // : 16762.38
x^-1 = 0.00003782
-1 < 0
1/(x^1) = 0.00003782 // * x^1
1 = 0.00003782*x^1 // : 0.00003782
26441.03648863 = x^1
x = 26441.03648863
x = 26441.03648863
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