A是不是真命题如何判断？
\u5224\u65ad\u662f\u5426\u4e3a\u771f\u547d\u9898\u771f\u547d\u9898
1\u3001a\uff1eb\uff0c\u5219a/b\uff1e1\uff0c\u662f\u5047\u547d\u9898\u30022\uff1e-1\uff0c\u52192/-1=-2\u5c0f\u4e8e1\u3002
2\u30014\u7684\u500d\u6570
绛旓細瑕佹牴鎹寮﹀嚱鏁颁笌浣欏鸡鍑芥暟鐨勬ц川鏉ュ垽鏂銆傦級锛屾墍浠鏄湡鍛介銆
绛旓細4. 璇嗗埆鍋囧懡棰橈細鍋囧懡棰樻寚鐨勬槸棰樿鏉′欢鎴愮珛锛屼絾缁撹涓嶆垚绔嬬殑鍛介銆備緥濡傦紝鈥滃鏋渁² = b²锛岄偅涔坅 = b鈥濊繖涓懡棰樻槸閿欒鐨勶紝鍥犱负(-2)² = 2²锛屼絾-2骞朵笉绛変簬2銆5. 璇佹槑鍋囧懡棰橈細瑕佽瘉鏄庝竴涓懡棰樻槸鍋囧懡棰橈紝鍙渶涓惧嚭涓涓緥瀛愶紝璇佹槑鍦ㄩ璁炬垚绔嬬殑鎯呭喌涓嬶紝缁撹涓嶆垚绔嬪嵆鍙
绛旓細A涓擝涓哄亣锛孉鐪烞蹇呭亣锛孉鍋嘊涓嶄竴瀹銆傝鎯冲懡棰樹负鐪熴傚繀椤籄B閮芥槸鐪熺殑銆傛墍浠ュ崟鐙竴涓狟灏辨帹鍑篊锛岃繖鏄剧劧涓嶅彲鑳姐傛瘮濡侫鏄亣锛屽嵆浣緽鏄湡涔熸帹涓嶅嚭鏉ャ傝孋鍙嶆帹B锛孋涓虹湡锛岄偅B涔熶竴瀹氭槸鐪熴傜涓鍙ヨ瘽璇翠簡锛孉涓擝涓虹湡锛孉鐪烞涔熺湡銆傛ゼ涓婄殑渚嬪瓙灏卞緢濂姐傛垜鍐嶄妇涓緥瀛愶紝锛堟湁闆堕锛堿涓旓紙鏈夊彲涔愶級B灏憋紙瀹呬竴...
绛旓細骞惰鏄庣悊鐢. 鑻>b,c=d,鍒檃c2>bd2;(鍋) 鑻,鍒檃>b;(鐪) 鑻>b涓攁b<0,鍒;(鍋) 鑻鑻,鍒檃>b;(鐪) 鑻a|b2;(鍏呰鏉′欢) 鍛介A:a鍛介A:,鍛介B:0璇存槑:鏈瑕佹眰瀛︾敓瀹屾垚涓绉嶈鑼冪殑璇佹槑鎴栬В棰樿繃绋,鍦ㄥ畬鍠勮В棰樿鑼冪殑杩囩▼涓畬鍠勮嚜韬昏緫鎬濈淮鐨勪弗瀵嗘. a,b鈭圧涓攁>b,姣旇緝a3-b3涓巃b...
绛旓細杩欏彞璇濇槸涓涓吀鍨嬬殑鎮栬銆傚嵆鑷浉鐭涚浘鐨勮瘽銆鑻ユ槸鐪熷懡棰橈紝鍒欒繖鍙ヨ瘽鍐呭涓虹湡锛岄偅涔堟牴鎹繖鍙ヨ瘽鐨勬剰鎬濓紝鍙堣鏄庤繖鍙ヨ瘽鏄亣鐨勶紝閭ｄ箞渚挎槸鍋囧懡棰锛屼絾濡傛灉鏄亣鍛介锛岄偅涔堣繖鍙ヨ瘽鏄亣鐨勶紝鏍规嵁鎰忔濓紝閭ｄ箞杩欏彞璇濇槸鐪熺殑锛岄偅涔堝張鎴愪簡鐪熷懡棰樸
绛旓細閫昏緫瀛︽湳璇.鐪熷煎彧鑳藉彇涓や釜鍊:鐪熸垨鍋.鐪熷搴鍒ゆ柇姝ｇ‘,鍋囧搴斿垽鏂敊璇.浠讳綍鍛介鐨勭湡鍊奸兘鏄敮涓鐨,绉扮湡鍊间负鐪熺殑鍛介涓鐪熷懡棰.绉扮湡鍊间负鍋囩殑鍛介涓哄亣鍛介.1銆佺湡鍛介灏辨槸姝ｇ‘鐨勫懡棰,鍗冲鏋滃懡棰樼殑棰樿鎴愮珛,閭ｄ箞缁撹涓瀹氭垚绔.濡:鈶犱袱鏉″钩琛岀嚎琚涓夋潯鐩寸嚎鎵鎴,鍐呴敊瑙掔浉绛夈傗憽濡傛灉a>b,b>c閭ｄ箞a>c.鈶㈠...
绛旓細浠锛屽鏋渁鎴愮珛锛屽垯b鎴愮珛锛宲鐨勫惁鍛介锛屽鏋a涓鎴愮珛锛屽垯b涓嶆垚绔嬶紝鏉′欢涓篴涓嶆垚绔嬶紝缁撴灉涓篵涓嶆垚绔嬶紝鍒欓潪p锛屽鏋渁鎴愮珛锛屽垯b涓嶆垚绔嬶紝闈瀙鐨勫惁鍛介锛屽鏋渁涓嶆垚绔嬶紝鍒檅鎴愮珛锛屾潯浠朵负a涓嶆垚绔嬶紝缁撴灉涓篵鎴愮珛锛岀敱姝ゅ彲鐪嬪嚭瀹冧滑鍖哄埆銆傚浜庝袱涓懡棰橈紝鑻ュ叾涓竴涓懡棰樼殑鏉′欢鍜岀粨璁哄垎鍒槸鍙︿竴涓懡棰樼殑鏉′欢鐨勫惁瀹氬拰...
绛旓細O鍛介浠ｈ〃锛氱壒绉板惁瀹氬懡棰橈紝鏈夌殑S涓嶆槸P銆傚悓涓绱犳潗鐨凙銆丒銆 I銆丱涔嬮棿瀛樺湪濡備笅鐪熷亣鍏崇郴锛1銆佺煕鐩惧叧绯汇傚垎鍙稿瓨鍦ㄤ簬A鍜0銆丒鍜孖涔嬮棿锛屽叿鏈夌煕鐩惧叧绯荤殑涓や釜鍒ゆ柇 锛屽嵆涓嶈兘鍚岀湡锛屼篃涓嶈兘鍚屽亣銆2銆佸弽瀵瑰叧绯汇傚瓨鍦ㄤ簬A鍜孍涔嬮棿銆 鍏锋湁鍙嶅鍏崇郴鐨勪袱涓垽鏂紝涓嶈兘鍚岀湡锛屽彲浠ュ悓鍋囥3銆佷笅鍙嶅鍏崇郴銆傚瓨鍦ㄤ簬I鍜...
绛旓細A鍛介(鎵鏈塖閮芥槸P)锛氭柇瀹氫簡S绫荤殑鎵鏈夊垎瀛愰兘鏄疨绫荤殑鍒嗗瓙.濡傛灉S鍜孭鍏锋湁鍚屼竴鎴栫湡鍖呭惈浜庡叧绯绘椂,閭ｄ箞A鍛介鐪锛涘鏋淪鍜孭鍏锋湁鐪熷寘鍚叧绯汇佷氦鍙夊叧绯诲拰鍏ㄥ紓鍏崇郴鏃,A鍛介涓哄亣.渚嬪锛氬嚒椹搩钖兘鏄湡璞.(鍚屼竴鍏崇郴) + 閲戝睘鏄儹鑳鍐风缉鐨.(鐪熷寘鍚簬鍏崇郴) + 鍑＄姱缃兘鏄晠鎰忕姱缃.(鐪熷寘鍚叧绯) - 鎵鏈夌殑绉戝...
绛旓細鐪/鍋囧畾涔夛細浣撴劅{鍋/鐪焳銆傛湁鐣屼负鐪燂紝鏃犵晫涓哄亣锛涘氨鏄鍙湁鍦ㄦ湁鐣岀殑鎯呭喌涓嬶紝涓浠朵簨鐗╂墠鑳藉琚劅鐭ヤ负鏄竴浠惰纭鐨勪簨鐗╋紱濡傛灉娌＄晫灏辨病娉曟劅鐭ュ埌鐪熸湁杩欎欢浜嬬墿銆傝繖灏辨槸鐪熷亣鐨勫惈涔夈傜湡鍋囨槸瀵逛簨鐗╀綋鎰熺煡绋嬪害鐨鍒ゆ柇锛屽叡鏈夊洓绾э細鍋囩殑鏈変笁绾э紝鐪熺殑鍙湁涓绾с傛垜浠父璇达細1銆佸惉寰涓嶆槸寰堢湡(澶辩湡)銆傛寚鐨勬槸...
