If \( \mathrm{U}=\{1,2,3,4,5,6,7,8\}, \mathrm{A}=\{1,2,3,4\}, \mathrm{B}=\{3,4,6\}, \mathrm{C}=\...
If \( \mathrm{U}=\{1,2,3,4,5,6,7,8\}, \mathrm{A}=\{1,2,3,4\}, \mathrm{B}=\{3,4,6\}, \mathrm{C}=\{5,6,7,8\} \); then verify \( \mathrm{A} \cup(\mathrm{B} \cup \mathrm{C})=(\mathrm{A} \cup \mathrm{B}) \cup \mathrm{C} \)
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