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	Notice: Undefined variable: deze_art_online_id in /websites/users/pyth/public_html/pythwww/mmmcms/public/menu.php on line 51 \ \ voorpagina Pygram-prijsvraag prijsvragen puzzels wis-spellen veelvlakken drogredeneringen vermoedens topologie rekenwerk links			Abonnementen en adreswijzigingen: 0522 855175 • English • Contact • Abonnementen
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			Notice: Undefined variable: trefwoord in /websites/users/pyth/public_html/pythwww/mmmcms/includes/find_trefwoord.php on line 687 Notice: Undefined variable: trefwoord in /websites/users/pyth/public_html/pythwww/mmmcms/includes/find_trefwoord.php on line 699 Notice: Undefined variable: trefwoord in /websites/users/pyth/public_html/pythwww/mmmcms/includes/find_trefwoord.php on line 703 Gevonden : haakjes wegwerken Notice: Undefined variable: isalgeweest in /websites/users/pyth/public_html/pythwww/mmmcms/includes/find_trefwoord.php on line 492 Notice: Undefined variable: isalgeweest in /websites/users/pyth/public_html/pythwww/mmmcms/includes/find_trefwoord.php on line 558 Gevonden artikelen in archief: Notice: Undefined variable: zoekresultaat in /websites/users/pyth/public_html/pythwww/mmmcms/includes/find_trefwoord.php on line 570 Notice: Undefined variable: br in /websites/users/pyth/public_html/pythwww/mmmcms/includes/contentbasis.php on line 385 Fout ... of toch goed? Als je niet goed haakjes wegwerkt, ontstaan fouten als (x + y)z = x + yz. In het algemeen is dit niet waar, maar in sommige gevallen 'klopt' deze vergelijking wel. Bijvoorbeeld (2 + 1)6 = 2 + 16. Maarten van den Hoek uit Eindhoven schreef een computerprogramma dat dergelijke voorbeelden opspoort. Zie archief: jaargang 29, nummer 1, september 1989 (totaal gevonden: 1) Notice: Undefined variable: dezecatagorie_id in /websites/users/pyth/public_html/pythwww/mmmcms/includes/oppapier.php on line 32 Notice: Undefined variable: dezecatagorie_id in /websites/users/pyth/public_html/pythwww/mmmcms/includes/oppapier.php on line 32 Notice: Undefined variable: dezecatagorie_id in /websites/users/pyth/public_html/pythwww/mmmcms/includes/oppapier.php on line 32 Notice: Undefined variable: dezecatagorie_id in /websites/users/pyth/public_html/pythwww/mmmcms/includes/oppapier.php on line 32 Notice: Undefined variable: dezecatagorie_id in /websites/users/pyth/public_html/pythwww/mmmcms/includes/oppapier.php on line 32 Notice: Undefined variable: br in /websites/users/pyth/public_html/pythwww/mmmcms/includes/contentbasis.php on line 385 Notice: Undefined variable: oppapier in /websites/users/pyth/public_html/pythwww/mmmcms/includes/oppapier.php on line 49 Notice: Undefined variable: br in /websites/users/pyth/public_html/pythwww/mmmcms/includes/contentbasis.php on line 385 Notice: Undefined variable: br in /websites/users/pyth/public_html/pythwww/mmmcms/includes/contentbasis.php on line 385 Notice: Undefined variable: br in /websites/users/pyth/public_html/pythwww/mmmcms/includes/contentbasis.php on line 385 Notice: Undefined variable: br in /websites/users/pyth/public_html/pythwww/mmmcms/includes/contentbasis.php on line 385 Notice: Undefined variable: br in /websites/users/pyth/public_html/pythwww/mmmcms/includes/contentbasis.php on line 385 Notice: Undefined variable: br in /websites/users/pyth/public_html/pythwww/mmmcms/includes/contentbasis.php on line 385 Notice: Undefined variable: br in /websites/users/pyth/public_html/pythwww/mmmcms/includes/contentbasis.php on line 385 Notice: Undefined variable: br in /websites/users/pyth/public_html/pythwww/mmmcms/includes/contentbasis.php on line 385 \ pythagoras op papier   laatste nummer • vorig nummer • archief • over pythagoras abonnementen • posters • oude jaargangen • kennismakingsnummer • Van viervlak naar ster