从写有123456的卡片中抽出四张卡片组成四位数可以有多少种组合法？ 123456共6位数，选三个数组成一组，共有几种组合？求公式...
123456\uff0c654321\uff0c345123\u2026\u2026(\u7531\u8fd9\u516d\u4f4d\u6570\u7ec4\u6210\u7684\u7ec4\u5408\u6709\u591a\u5c11\u79cd\uff0c\u544a\u77e5\u65b9\u6cd5\uff0c\u8c22\u8c22)720\u79cd\uff0c\u6392\u5217A66
\uff1d\uff086*5*4\uff09/\uff083*2*1\uff09\uff1d20\u79cd\u3002
\u53ea\u5e94\u8be5\u662f20\u79cd\uff0c\u5176\u4f59\u7684\u90fd\u5e94\u8be5\u662f\u91cd\u590d\u7684\u3002\u6bd4\u5982321\u53d8\u6210132\u8fd9\u6837\u7684\u3002
\u5982\u679c\u653e\u5728\u4e0d\u540c\u6570\u4f4d\u4e0a\u5c31\u8868\u793a\u4e0d\u540c\uff0c\u90a3\u4e48\u5c31\u5e94\u8be5\u662f120\u79cd\u3002
\u56e0\u4e3a\u6bcf\u4e00\u7ec4\u76843\u4e2a\u6570\u5b57\uff0c\u90fd\u53ef\u4ee5\u7ec4\u6210\u4e0d\u540c\u76846\u4e2a\u6570\uff0c\u6240\u4ee520*6\uff1d120\u4e2a\u3002
绛旓細涓夊崄鍏垎涔嬩節 涔熷氨鏄 鍥涘垎涔嬩竴
绛旓細璁剧涓寮犵殑鏁板瓧鏄痑, 鍒欑浜屽紶鏄-4a, 绗笁寮犳槸-4锛-4a锛=16a 涓夊紶鐨勫拰鏄 a+(-4a)+16a=13a -2132梅13=-164 . 锛 -164锛*锛-4锛夛紳656 656*锛-4锛夛紳-2624 鎵浠ュス 鎷跨殑涓夊紶鏄 -164 656 -2624 -13312梅13锛-1024 锛-1024锛*锛-4锛夛紳4096 4096*锛-4锛夛紳-16384 涓夊紶鏄 -1024...
绛旓細4绉嶏紝3鍜6锛4鍜6锛5鍜6锛4鍜5
绛旓細6绉嶏紝1,2,3,4,5,6,銆傚洜涓虹幇鍦ㄦ墸鐫鐨勪粛鏄叚寮鍗＄墖锛屾晠姣忓紶鍗＄墖閮藉彲鑳芥娊鍒帮紝閮戒负1/6
绛旓細鍥犱负濂囨暟鏈変笁寮狅紝鍋舵暟鏈変笁寮 鎵浠3+1=4寮 54-2=52鎶藉嚭涓ゅ紶鐜嬬墝 52/4=13涓鍏辨湁4绉嶈姳鑹诧紝姣忕13寮 13*3=39 闄ょ孩妗冦佺帇鐗屽锛屽叾浠栫殑鍏39寮 39+2=41 闄ょ孩妗冨锛屽叡鏈41寮 鍒欏墿涓嬬殑鍏ㄩ儴鏄孩妗冿紝鍐嶆娊涓寮狅紝灏变竴瀹氭槸绾㈡銆傛墍浠ユ娊42寮犵墝锛屽垯缁濆鏈変竴寮犳槸绾㈡ ...
绛旓細123456 123564 124356 124536 125364 125436 132456 132564 134256 134652 135264 135624 136452 136524 142356 142536 143256 143652 145236 145632 146352 146532 152364 152436 153264 153624 154236 154632 156324 156432 163452 163524 ...
绛旓細鑳借4鏁撮櫎鐨勬暟鏈鍚庝袱浣嶉兘鑳借鍥涙暣闄 123456涓鑳借鍥涙暣闄ゅ緱涓や綅鏁扮粍鍚堟湁12 16 24 32 36 52 56 64锛屾瘡涓袱浣嶆暟閮芥湁4脳3脳2脳1=24绉嶇粍鍚堬紝鍒欏叡鏈24脳8=192涓兘琚4鏁撮櫎鐨勫叚浣嶆暟
绛旓細4脳6脳(3-2)=244脳6脳(2-1)=244脳5+3+1=245脳6-5-1=245脳6-4-2=243脳6+5+1=243脳6+4+2=24
绛旓細绉皬浜10鐨勬儏鍐典竴鍏辨湁 (1,1)(1,2)(1,3)(1,4)(1,5)(1,6)(2,1)(2,2)(2,3)(2,4)(3,1)(3,2)(3,3)(4,1)(4,2)(5,1)(6,1)17绉嶆儏鍐碉紝鑰屽ぇ浜10鏈6*6-17-2锛堢瓑浜10鐨勬儏鍐碉級=17绉嶆儏鍐碉紝涓よ呯浉鍚岋紝鎵浠ュ叕骞
绛旓細缁勬垚30涓笉閲嶅鐨勪袱浣嶆暟锛岃兘缁勬垚720涓笉閲嶅鐨勫叚浣嶆暟銆
