Category: Set Theory

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…

Question Number 71396 by mhmd last updated on 15/Oct/19 Terms of Service Privacy Policy Contact: info@tinkutara.com

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

Question Number 5080 by FilupSmith last updated on 10/Apr/16 $$\mathit{N}=\{0,1,2,\dots \}$$$$\mid \mathit{N}\mid ={\mathrm{\aleph }}_0$$$$$$$$\mathrm{I}\mathrm{know}\mathrm{that}:$$$$\mathrm{if}\mathit{S}=\{k,0,1,2,\dots \}$$$$\therefore \mid \mathit{S}\mid =\mid \mathit{N}\mid ={\mathrm{\aleph }}_0$$$$\mathrm{Because}\mathrm{you}\mathrm{can}\mathrm{forever}\mathrm{pair}\mathrm{one}\mathrm{value}$$$$\mathrm{from}\:\mathrm{one}\:\mathrm{set}\:\mathrm{to}\:\mathrm{another}. \…

Question Number 135634 by oustmuchiya@gmail.com last updated on 14/Mar/21 Answered by physicstutes last updated on 14/Mar/21 $$\left(i\right)n\left(B\right)=8+5+x-4=11+x$$$$n(B\cup C)=8+x-4+5+2y=9+x+2y$$$$\Rightarrow 11+x=9+x+2y\Rightarrow 2=2y\Rightarrow y=1$$$$\left(ii\right)n\left(C\right)=5+2y$$$$\mathrm{and}\:{n}\left({A}\right)\:=\:\mathrm{15}…