根号（7+根号6）-根号（7-根号6）
\u6bd4\u8f837\u500d\u6839\u53f76\u4e0e6\u500d\u6839\u53f77\u7684\u5927\u5c0f7\u221a6 =\u221a\uff086\u00d77²\uff09=\u221a294
6\u221a7=\u221a(7\u00d76²)=\u221a252\uff1c\u221a294
\u22347\u221a6\uff1e6\u221a7
\u8fd9\u662f\u6211\u5728\u9759\u5fc3\u601d\u8003\u540e\u5f97\u51fa\u7684\u7ed3\u8bba\uff0c
\u5982\u679c\u80fd\u5e2e\u52a9\u5230\u60a8\uff0c\u5e0c\u671b\u60a8\u4e0d\u541d\u8d50\u6211\u4e00\u91c7\u7eb3~\uff08\u6ee1\u610f\u56de\u7b54\uff09
\u5982\u679c\u4e0d\u80fd\u8bf7\u8ffd\u95ee\uff0c\u6211\u4f1a\u5c3d\u5168\u529b\u5e2e\u60a8\u89e3\u51b3\u7684~
\u7b54\u9898\u4e0d\u6613\uff0c\u5982\u679c\u60a8\u6709\u6240\u4e0d\u6ee1\u613f\u610f\uff0c\u8bf7\u8c05\u89e3~
\u221a7-\u221a6 \u221a6-\u221a5
\u89e3\uff1a\u4e24\u5f0f\u540c\u65f6\u5e73\u65b9\uff0c\u5f97
\uff08\u221a7-\u221a6\uff09²
=7-2\u221a42+6
=1-2\u221a42
\uff08\u221a6-\u221a5\uff09²
=6-2\u221a30-5
=1-2\u221a30
\u22351-2\u221a42\uff1e1-2\u221a30
\u221a7-\u221a6\uff1e\u221a6-\u221a5
\u6ce8\uff1a\u221a \u662f\u6839\u53f7
7减根号6
根号（14-2倍的根号43）
绛旓細浣犲厛鎶婁粬浠钩鏂癸紝鍐嶅紑鏂圭瓑浜鏍瑰彿锛14鈥旀牴鍙43锛
绛旓細鍖栫畝(鏍瑰彿7-鏍瑰彿6)鐨2娆℃柟+(鏍瑰彿7+2)(2鏍瑰彿6-1) 1涓洖绛 #鐑# 宸插濂虫у氨搴旇鎵挎媴瀹堕噷澶ч儴鍒嗗鍔″悧?fcybery 2014-08-15 路 TA鑾峰緱瓒呰繃581涓禐 鐭ラ亾灏忔湁寤烘爲绛斾富 鍥炵瓟閲:796 閲囩撼鐜:0% 甯姪鐨勪汉:405涓 鎴戜篃鍘荤瓟棰樿闂釜浜洪〉 鍏虫敞 灞曞紑鍏ㄩ儴 鏈洖绛旂敱鎻愰棶鑰呮帹鑽 宸茶禐杩 宸茶俯杩< 浣犲杩...
绛旓細(1)鍘熷紡=锛鏍瑰彿7-鏍瑰彿6锛/锛堟牴鍙7+鏍瑰彿6锛夛紙鏍瑰彿7-鏍瑰彿6锛=鏍瑰彿7-鏍瑰彿6 锛2锛夊師寮=(鏍瑰彿n+1-鏍瑰彿n)/(鏍瑰彿n+1+鏍瑰彿n)(鏍瑰彿n+1-鏍瑰彿n)=鏍瑰彿锛坣+1锛-鏍瑰彿n
绛旓細灞炰簬锛堟牴鍙7-鏍瑰彿6锛脳锛堟牴鍙7+鏍瑰彿6锛=7-6=1 鎵浠ユ牴鍙7-鏍瑰彿6涓庢牴鍙7+鏍瑰彿6 浜掍负鍊掓暟
绛旓細鍘熷紡=(鈭7)^2-(鈭6)^2-[(鈭3)^2+2*鈭3*鈭6+(鈭6)^2]=7-6-(3+2鈭18+6)=1-3-6鈭2-6 =-8-6鈭2
绛旓細锛鏍瑰彿7-鏍瑰彿6锛=1/锛堟牴鍙7+鏍瑰彿6锛夛紙鏍瑰彿6-鏍瑰彿5锛=1/锛堟牴鍙6+鏍瑰彿5锛夛紙鏍瑰彿7+鏍瑰彿6锛夊ぇ浜庯紙鏍瑰彿6+鏍瑰彿5锛,鍏跺掓暟1/锛堟牴鍙7+鏍瑰彿6锛夊皬浜1/锛堟牴鍙6+鏍瑰彿5锛夋墍浠ワ紙鏍瑰彿7-鏍瑰彿6锛夊皬浜庯紙鏍瑰彿6-鏍瑰彿5锛
绛旓細鍘熷紡=銆岋紙鏍瑰彿7-鏍瑰彿6锛夛紙鏍瑰彿7+鏍瑰彿6锛夈嶇殑2007娆℃柟 =銆岋紙鏍瑰彿7锛夌殑骞虫柟-锛堟牴鍙6锛夌殑骞虫柟銆嶇殑2007娆℃柟 = 銆7-6銆嶇殑2007娆℃柟 = 1
绛旓細绗簩棰樺凡鎻掑叆浜嗗浘鐗 2x²锛3xy锛2y²=0 (2x-y)(x+2y)=0 2x=y 鎴杧=-2y 鍒嗗埆浠ｅ叆锛坸+y)/(x-y)寰 鍘熷紡=-3鎴1/3
绛旓細鈭1/(鈭7+鈭6)<1/(鈭6+鈭5).妤间笂鐨勬柟娉曡櫧鐒朵篃瀵癸紝浣嗘槸鏈夌偣灏忛夯鐑︿簡銆傚懙鍛碉紝妤间富瑕佺畝鍗曠殑锛熻繖涓ソ鍔烇紒鐪嬩笅闈㈢殑瑙勫緥锛氶亣鍒帮細鈭(n+1)-鈭歯鍜屸垰n-鈭(n-1)姣旇緝澶у皬锛屽彧瑕乶鏄鏁存暟锛屽氨鏄墠闈㈢殑灏忋傚苟涓鏍瑰彿鍦颁笅涓嶅厜鏄(n+1)锛(n-1)涔嬫祦鏄繖鏍凤紝鍗充究鍍忔槸(n+a)锛(n-a)涔嬫祦锛屽彧瑕乤...
绛旓細鍒嗗瓙鏈夌悊鍖栵紝灏嗕粬浠湅鎴愭槸鍒嗘瘝涓1鐨勫垎鏁帮紝鐒跺悗涔樹互涓滄牴鍙7+鏍瑰彿6鈥濇垨鑰呪滄牴鍙6-鏍瑰彿5鈥濓紝鏈鍚庡寲鎴1/锛堟牴鍙7+鏍瑰彿6锛鍜1/锛堟牴鍙6+鏍瑰彿5锛夈傛樉鐒跺垎姣嶆槸鍓嶈呭ぇ锛屽垎鏁版槸鍚庤呭ぇ銆傚緱璇併
