关于实数的数学题目。
\u6570\u5b66\u5b9e\u6570\u9898\u76ee2\uff1b9
1\u3001\u53ea\u6709x=\u03c0\u65f6\u6210\u7acb\uff0c\u5373x=\u03c0 \u539f\u5f0f=\u03c0-1/\u03c0
2\u30015\uff0d\u221a3a\uff1d2b\uff0b3\u5206\u4e4b2\u221a3\uff0da\uff0ca\u662f\u5426\u5728\u6839\u53f7\u5185\u4e0d\u660e\u767d\uff0c\u4e0d\u80fd\u89e3\u7b54
2.根号2和根号8，根号6和根号24
1.
原式=a-b
2.
a=根号（2）,b=根号(8)
a*b=4
a=根号(5),b=根号(125)
a*b=25
1 (a-b)^2=(b-a)^2=a²-2ab+b²
2 √2*√32=8 √2*√18=6
绛旓細1.鍥犱负锛坸-鈭3锛²鍜寍y+3|浜掍负鐩稿弽鏁板啀鍥犱负锛坸-鈭3锛²鐨勫煎ぇ浜庣瓑浜0|y+3|澶т簬绛変簬0鎵浠ワ紙x-鈭3锛²=0锛寍y+3|=0鎵浠=鈭3锛孻=-3 X-Y=鈭3+3 2.绗簩棰樺彲浠ュ厛鐢ㄨ绠楀櫒绠楀嚭鈭15鐨勬暣鏁伴儴鍒 閭ｄ箞A=鈭15-3 B=-鈭15+3 A+B=鈭15-3-鈭15+3 A+B=0 3.涓...
绛旓細2a-3 + 3a-22 = 0 5a-25=0 a=5 2a-3=7 鎵浠ヨ繖涓暟鏄7^2=49 2a=10 3^2=9 3.1^2=9.61 3.2^2=10.24 3.15^2=9.9225 鎵浠2a鐨勭畻鏈钩鏂规牴灏忎簬3.15锛屽ぇ浜3.1 杩戜技鍊间负3.1
绛旓細鐢变簩娆℃牴寮忕殑琚紑鏂规暟闈炶礋鍙緱锛寈²-16鈮0涓攛²-16鈮0锛屸埓x²-16=0,x=卤4,褰搙=4鏃,鍒嗘瘝8-2x=0娌℃湁鎰忎箟锛屸埓x= -4锛寉= -9/16锛寈y=9/4锛屸埓xy鐨勫钩鏂规牴涓郝3/2.
绛旓細鍥犱负鏍瑰彿涓嬪紡瀛愬ぇ浜庣瓑浜0 鎵浠 x鐨勫钩鏂-16>=0锛16-x鐨勫钩鏂>=0锛岃仈绔嬩袱寮忥紝寰梮=姝ｈ礋4 鍙堝洜涓哄垎姣嶄笉鑳戒负闆讹紝鎵浠8-2x涓嶇瓑浜0锛屾墍浠涓嶇瓑浜4锛屾墍浠=-4 灏唜=-4甯﹀叆鍘熷紡y褰撲腑锛屽緱y=-9/16銆傛墍浠y=9/4锛寈y鐨勫钩鏂规牴=卤3/2
绛旓細寮忓瓙9鈭1/27=鈭9²/27=鈭3鍜4鈭1/8=鈭4²/8=鈭2杩樻垚绔 2鈭1/2=鈭4/2=鈭2 11鈭2/11=鈭2*121/11=鈭22 6鈭1/12=鈭36/12=鈭3
绛旓細瑙ｏ細鐢眣=鏍瑰彿x-3+鏍瑰彿3-x+8 寰 x-3>=0, 3-x>=0 浠庤 x=3 鍥犳 y=鏍瑰彿x-3+鏍瑰彿3-x+8 =鏍瑰彿3-3+鏍瑰彿3-4+8 =8 鈭磝+3y鐨勭珛鏂规牴=3+3*8鐨勭珛鏂规牴 =27鐨勭珛鏂规牴 =3
绛旓細锛堟牴鍙3+鏍瑰彿2锛塣2-锛堟牴鍙3-鏍瑰彿2锛塣2=(鏍瑰彿3+鏍瑰彿2+鏍瑰彿3-鏍瑰彿2)(鏍瑰彿3+鏍瑰彿2-鏍瑰彿3+鏍瑰彿2)=2鏍瑰彿3脳2鏍瑰彿3=4鏍瑰彿6鈮4脳2.449鈮9.80
绛旓細缁欏嚭鏋勯燼1,a2,a3,...鐨勭畻娉曞嵆鍙 璁緓鏄湁鐞嗘暟锛岀敤[x]琛ㄧず涓嶈秴杩噚鐨勬渶澶ф暣鏁 瑙傚療浠ｆ暟寮忥細x=a1+a2/2!+a3/3!+...+ak/k!寰堝鏄撶湅鍑 a1=[x]a2=[x2]锛屽叾涓細x2=(x-a1)*2 a3=[x3]锛屽叾涓細x3=(x2-a2)*3 a4=[x4]锛屽叾涓細x4=(x3-a3)*4 a5=[x5]锛屽叾涓細x5=(x4-a4)*5...
绛旓細绗竴缁勫惈1涓紝绗2缁勫惈3涓暟锛...,绗琻缁勫惈2n-1涓暟锛岄偅涔堝墠n缁勫叡鍚1+3+5+...+(2n-1)=n²涓暟锛岃2013鍦ㄧm+1缁勫唴锛岄偅涔堝墠m缁勫叡鍚玬²涓暟锛屽叾涓m缁勬渶鍚庣殑涓涓暟涓哄ぇ鏁板垪鐨勭m²涓紝涓2m²-1,閭ｄ箞2m²-1<2013,2m²<2014 m²<1012 ...
绛旓細鍖呮嫭鏈夌悊鏁板拰鏃犵悊鏁般傚叾涓棤鐞嗘暟灏辨槸鏃犻檺涓嶅惊鐜皬鏁帮紝鏈夌悊鏁板氨鍖呮嫭鏁存暟鍜屽垎鏁般鏁板涓婏紝瀹炴暟鐩磋鍦板畾涔変负鍜屾暟杞翠笂鐨勭偣涓涓瀵瑰簲鐨勬暟銆傛湰鏉ュ疄鏁颁粎绉颁綔鏁帮紝鍚庢潵寮曞叆浜嗚櫄鏁版蹇碉紝鍘熸湰鐨勬暟绉颁綔鈥滃疄鏁扳濃斺旀剰涔夋槸鈥滃疄鍦ㄧ殑鏁扳濄備綘鎻愪緵鐨勮繖涓暟姣忎釜鏁 閮芥槸3^n (3鐨刵娆℃柟)缁勬垚鐨勫皬鏁.铏界劧鏈夎寰,浣嗙洰鍓...
