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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
0.02/x = 2 // - 2
0.02/x-2 = 0
0.02*x^-1 = 2 // : 0.02
x^-1 = 100
-1 < 0
1/(x^1) = 100 // * x^1
1 = 100*x^1 // : 100
1/100 = x^1
x = 1/100
x = 1/100
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