ãã2. p or qâr <==> â(p or q) or r
ãã<==> (âp and âq) or r<==> (âp or r) and (âqor r)
ãã<==> (âp or (q and âq) or r) and ( (p and âp) or âqor r)
ãã<==> (âp or q or r) and (âp or âq or r) and ( (p or âq or r) and ( âp or âq or r)
ãã<==> (âp or q or r) and (âp or âq or r) and (p or âq or r)
ãã<==> M2 and M4 and M6 ï¼ä¸»ååèå¼ï¼
ãã<==> m0 or m1 or m3 or m5 or m7 ï¼ä¸»æåèå¼ï¼
ãã3. è¯æ
ãã(1) âs åæå¼å
¥
ãã(2) âs â âr åæå¼å
¥
ãã(3) âr (1)(2)åè¨æ¨ç
ãã(4) (p and q) â r åæå¼å
¥
ãã(5) â(p and q) (3) (4)æåå¼
ãã(6) âp or âq (3) (4)æåå¼
ãã(7) p åæå¼å
¥
ãã(8) âq (6)(7) æåä¸æ®µè®º
å¾è¯ã
ããç»å¤äºï¼å°±åè¿ä¸¤é¢ï¼å
¶ä½èªå·±åã
追é®è½ä¸è½é½ç»äºï¼æè¦ä¼æåå¸åå¹²åã
追çããåé¢æ¶å¦çç天èï¼â 天èâ ç¥éåï¼æä¹æ²¡å¦è¿è¿é¨è¯¾ï¼å®æäºè¯¾ä¸ä¸ä¸è¡ï¼å®å
¨æ¯è¾¹èªå¦è¾¹ä¸è¯¾ï¼è¯´æè¿é¨è¯¾å¹¶ä¸é¾ï¼å¨æå°±ä¼äºã
ããä½ èªå·±è¯è¯ï¼
追é®è¿æ¯å¤å¤§çé¢ï¼æ人çï¼æ ¹æ¬æ²¡å¦ãããä¸ç¹é½ä¸ä¼ï¼ä¸è¯¾ä¹æ²¡å»è¿ãã
追çæ们çèµ·ç¹ä¸æ ·ï¼ç书----åé¢----åç书----ååé¢----ä¼äº----å¯ä»¥å½èå¸äºã
追é®è¿è½åä¸ãè½åçä¸ é纳 追å ç»åã
追çæ¬é¢å·²ç»åå®ã