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D( x )
(-e)^i = 0
(-e)^i = 0
(-e)^i = 0
x naleu017Cy do O
x in (-oo:+oo)
(3^x)/((-e)^i) = 0
(3^x)/((-e)^i) = 0 // * (-e)^i
3^x = 0
x naleu017Cy do O
x belongs to the empty set
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