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Mathematics 7 Online
OpenStudy (anonymous):

duck

OpenStudy (zzr0ck3r):

x^3?

OpenStudy (anonymous):

oops...i used "element of" instead of equals

OpenStudy (anonymous):

yes sorry

OpenStudy (zzr0ck3r):

yeah looks fine

OpenStudy (zzr0ck3r):

seems like you would only need to show a contradiction case like x^3 is never equal to 2.1 when x is natural, so its not onto

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