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wu :: forums    riddles    easy (Moderators: Icarus, ThudnBlunder, SMQ, Eigenray, towr, william wu, Grimbal)    x^2+x+1 « Previous topic | Next topic » Pages: 1  Reply Notify of replies Send Topic Print    Author  Topic: x^2+x+1  (Read 402 times) codpro880 Junior Member Teachers strike, students hurt. English...     Gender: Posts: 89 x^2+x+1   « on: May 7th, 2009, 12:12pm » Quote Modify If x^2+x+1=0, what is the value of (x^3+1/x^3)^3? IP Logged You miss 100% of the shots you never take. pex Uberpuzzler     Gender: Posts: 880 Re: x^2+x+1   « Reply #1 on: May 7th, 2009, 12:49pm » Quote Modify on May 7th, 2009, 12:12pm, codpro880 wrote: If x^2+x+1=0, what is the value of (x^3+1/x^3)^3? It's . . . eight . . because (x-1)(x2+x+1)=x3-1, so we have x3=1. IP Logged codpro880 Junior Member Teachers strike, students hurt. English...     Gender: Posts: 89 Re: x^2+x+1   « Reply #2 on: May 10th, 2009, 5:42pm » Quote Modify yep, that was a much more clever solution than what I did. I was dealing with imaginaries...silly me. « Last Edit: May 24th, 2009, 8:15pm by codpro880 » IP Logged You miss 100% of the shots you never take. Pages: 1  Reply Notify of replies Send Topic Print Forum Jump: ----------------------------- riddles -----------------------------=> easy   - medium   - hard   - what am i   - what happened   - microsoft   - cs   - putnam exam (pure math)   - suggestions, help, and FAQ   - general problem-solving / chatting / whatever ----------------------------- general -----------------------------  - guestbook   - truth   - complex analysis   - wanted   - psychology   - chinese « Previous topic | Next topic »

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