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D( x )
9.45*x^(10^12) = 0
9.45*x^(10^12) = 0
9.45*x^(10^12) = 0
9.45*x^1000000000000 = 0 // : 9.45
x^1000000000000 = 0
x = 0
x in (-oo:0) U (0:+oo)
(9*x^(10^14))/(9.45*x^(10^12)) = 0
0.95238095*x^99000000000000 = 0 // : 0.95238095
x^99000000000000 = 0
x = 0
x in { 0}
x belongs to the empty set
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