Category: Set Theory

Question Number 7440 by Tawakalitu. last updated on 29/Aug/16 $${Prove}\:{that} \\ $$$${If}\:\:{A},\:{B}\:{and}\:{C}\:{are}\:{subset}\:{of}\:{the}\:{same}\:{universal}\:{set} \\ $$$${then}\:\left({A}\:−\:{B}\right)\:\cap\:\left({A}\:−\:{C}\right)\:=\:{A}\:−\:\left({B}\:−\:{C}\right) \\ $$ Commented by Yozzia last updated on 29/Aug/16 $${Let}\:{A}=\left\{\mathrm{1},\mathrm{2},\mathrm{3},\mathrm{4}\right\},\:{B}=\left\{\mathrm{2},\mathrm{3},\mathrm{4},\mathrm{5}\right\},\:{C}=\left\{\mathrm{3},\mathrm{4},\mathrm{5},\mathrm{6}\right\}. \\…

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Question Number 137014 by sdfg last updated on 28/Mar/21 Commented by yutytfjh67ihd last updated on 29/Mar/21 Commented by yutytfjh67ihd last updated on 29/Mar/21 Terms of…

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Question Number 70704 by 20190927 last updated on 07/Oct/19 $$\mathrm{z}^{\mathrm{4}} −\mathrm{2z}^{\mathrm{2}} +\mathrm{2}=\mathrm{0} \\ $$ Commented by mathmax by abdo last updated on 08/Oct/19 $${z}^{\mathrm{4}} −\mathrm{2}{z}^{\mathrm{2}}…