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x in (-oo:+oo)
x*(sin(-8*x)/8) = 0
x = 0
sin(-8*x)/8 = 0
sin(-8*x)/8 = 0 // * 8
sin(-8*x) = 0
sin(-8*x) = 0 <=> -8*x = pi*k_1 i k_1 należy do I
t_1 = pi*k_1
-t_1-8*x = 0
-t_1-8*x = 0 // + t_1
-8*x = t_1 // : -8
x = t_1/(-8)
x = pi*k_1/(-8) i k_1 należy do I
x*(sin(-8*x)/8) = 0 <=> x = 0 or x*(sin(-8*x)/8) = 0 <=> sin(-8*x)/8 = 0
x in { 0, pi*k_1/(-8) }
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