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D( v )
v^2 = 0
v^2 = 0
v^2 = 0
1*v^2 = 0 // : 1
v^2 = 0
v = 0
v in (-oo:0) U (0:+oo)
8-(6*v)-((2*v^2)/(v^2))+8 = 0
8-6*v-2+8 = 0
14-6*v = 0 // - 14
-6*v = -14 // : -6
v = -14/(-6)
v = 7/3
v = 7/3
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