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D( x )
e^6 = 0
e^6 = 0
e^6 = 0
e^6 = 0
x belongs to the empty set
x in (-oo:+oo)
(1/(e^6))*x = 8.3 // - 8.3
(1/(e^6))*x-8.3 = 0
(1/(e^6))*x-8.3 = 0 // + 8.3
(1/(e^6))*x = 8.3 // : 1/(e^6)
x = 8.3/(1/(e^6))
x = 8.3*e^6
x = 8.3*e^6
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