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D( x )
x < 0
1*x^(10^-6) = 0
x < 0
1*x^(10^-6) = 0
1*x^(10^-6) = 0
x^(10^-6) = 0
1*x^(1/1000000) = 0 // : 1
x^(1/1000000) = 0
x = 0
x in (0:+oo)
1*(70/(1*x^(10^-6))) = 0
70/(x^(10^-6)) = 0
70*x^(-1/1000000) = 0 // : 70
x^(-1/1000000) = 0
x naleu017Cy do O
x belongs to the empty set
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