????涓?瑙?褰㈢??涓?杈瑰?崇郴(涓?瑙?褰㈢??涓??¤竟???涔??崇郴)
????涓?杈瑰?崇郴:浠绘??涓よ竟涔???澶т?绗??杈癸?浠绘??涓よ竟涔?宸??浜?绗??杈广??
1涓?瑙?褰??杈瑰?崇郴璇???????璁句?瑙?褰㈢??涓??¤竟??锛?B锛?C锛???A+B >锛?c锛?a & gtc-b锛?b+ c & gt锛?a锛?b & gta-c锛?a+c & gt锛?b锛?c & gt?电???绌鸿?
????渚?:浠绘??? ??BC锛?楠?璇?AB+AC >: BC .
????璇???:??A??寤堕?跨嚎涓???AD=AC
?????ｄ???D=??ACD(绛?杈圭?浠?
?????碘??BCD & gt锛???ACD
?????粹??bcd>锛???D
??????d>锛?BC(澶ц?搴?s澶ц竟缂?)
??????D = a b+ AD = a b+ AC
??????b+ac>锛???????
2涓?瑙?褰㈠??绫?p>????涓?瑙?褰㈡??杈瑰??涓虹?杈逛?瑙?褰€??绛??颁?瑙?褰㈠??涓?绛?杈逛?瑙?褰€????瑙?搴﹀??锛????磋?涓?瑙?褰€????瑙?涓?瑙?褰€????瑙?涓?瑙?褰€??涓?瑙?褰㈢??绋冲??т娇?朵?????杈瑰舰?ｆ?峰?????褰???锋??绋冲????㈠?恒?????????圭?广??涓?瑙?褰㈢????ㄥ伐绋?涓???ㄥ箍娉?锛?璁稿?寤虹??芥???瑙?褰㈢?????3涓?瑙?褰㈢??杈归?垮???