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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)
16-(8*v)-((2*v^2)/(v^2))+32 = 0
16-8*v-2+32 = 0
46-8*v = 0 // - 46
-8*v = -46 // : -8
v = -46/(-8)
v = 23/4
v = 23/4
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