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D( w )
w = 0
(w+4)^0 = 0
w+4 = 0
w = 0
w = 0
(w+4)^0 = 0
t_1 = 1
t_1+0 = 0
t_1 = 0
t_1 = 0
w naleu017Cy do R
w+4 = 0
w+4 = 0
w+4 = 0 // - 4
w = -4
w belongs to the empty set
97/((w+4)^0) = 95/((w+4)^0)-(6/w)
w belongs to the empty set
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