请教初中数学问题，求高手解答，要有详细步骤哦~
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3-2=1
8+7-6-5=4
15+14+13-12-11-10=9
24+23+22+21-20-19-18-17=16
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\u7b2cn\u884c \u67092n+1\u4e2a\u6570\uff0c\u6700\u540e\u4e00\u4e2a\u662f 1+3+5+\uff082n+1\uff09=n\u5e73\u65b9
45> 2014\u5f00\u5e73\u65b9>44 2014\u5728\u7b2c44\u884c\uff0c\u7b2c44\u884c\u5171\u6709 89\u4e2a\u6570\uff0c
\u56e0\u4e3a44\u5e73\u65b9=1936 45\u5e73\u65b9=2025\uff0c 2014-1936=78
2014\u4e3a\u7b2c44\u884c\u53f3\u8d77\u7b2c79\u4e2a\u6570\uff0c\u56e0\u4e3a\u7b2c44\u884c\u5171\u670989\u4e2a\u6570\uff0c\u6240\u4ee5\u5de6\u8d77\u7b2c11
\u7efc\u4e0a\u6240\u8ff0 2014\u51fa\u73b0\u572844\u884c\uff0c\u5de6\u8d77\u7b2c11\u4e2a\u6570
\u4e8c\uff0e\u5c06\u4e00\u5217\u6570-1\uff0c2\uff0c-3\uff0c4\uff0c-5\uff0c6\uff0c\u2026\uff0c\u5982\u56fe\u6240\u793a\u6709\u5e8f\u6392\u5217\uff0e\u6839\u636e\u56fe\u4e2d\u6392\u5217\u89c4\u5f8b\u77e5\uff0c\u201c\u5cf01\u201d\u4e2d\u5cf0\u9876\u4f4d\u7f6e\uff08C\u7684\u4f4d\u7f6e\uff09\u662f4\uff0c\u90a3\u4e48\uff0c\u201c\u5cf04\u4e2dC\u3000\u7684\u4f4d\u7f6e\u7684\u6709\u7406\u6570\u662f___\uff0e\u6709\u7406\u6570-2015\u5e94\u6392\u5728A,B,C,D,E\u7684____\u4f4d\u7f6e
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\u6240\u4ee5\u5cf0n\u4e2d\u5cf0\u9876C\u7684\u4f4d\u7f6e\u7684\u6570\u4e3a5n-1
\u6240\u4ee5\u5cf04\u4e2dC\u7684\u4f4d\u7f6e\u7684\u6709\u7406\u6570\u662f5\u00d74-1=19
\uff082\uff09\u75315n-1=\uff5c-2015\uff5c
N=403.2
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\u800c-2015\u662f2014\u7684\u4e0b\u4e00\u4e2a\u6570\u5373\u5728D\u70b9
先对其左边通分得(Ax+Bx-3A+2B)/x2-x-6，分母相同，分子也应相同，则左边分子为(A+B)x-(3A-2B)=7x-11,由类比法，得A+B=7,3A-2B=11,解的A=5,B=2
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绛旓細锛堟湭鐭ユ暟鏈楂樻鏁颁负1锛3-m 鈮 0 m 鈮 -3 锛3-m绛変簬0鐨勮瘽鏈煡鏁板氨涓嶅瓨鍦ㄤ簡锛夆埓m=3 10銆 x+2=3 7x=6x-7 瑙ｏ細x+2-2=3-2 瑙ｏ細7x+7-6x =6x-7-6x-7 x =1 x+7 =0 x = -7 -3/2x=5/2+x -2/3x= -1/2 瑙ｏ細-3/2x脳2=...
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绛旓細锛1锛夎绉熺敤鐢茬璐ц溅 x 杈嗭紝鍒欑鐢ㄤ箼绉嶈揣杞 8-x 杈嗐傚彲鍒椾笉绛夊紡缁勶細4x+2(8-x) 鈮 20 锛寈+2(8-x) 鈮 12 锛岃В寰楋細2 鈮 x 鈮 4 锛屽垯鏈 3 绉嶆柟妗堬細鈶 绉熺敤鐢茬璐ц溅 x = 2 杈嗭紝绉熺敤涔欑璐ц溅 8-x = 6 杈嗭紱鈶 绉熺敤鐢茬璐ц溅 x = 3 杈嗭紝绉熺敤涔欑璐ц溅 8-x = 5 杈嗭紱鈶 ...
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绛旓細瑙ｇ瓟濡備笅锛氱涓闂細璁続鍨嬫瘺绗旂殑闆跺敭浠蜂负x鍏冿紝B鍨嬫瘺绗旂殑闆跺敭浠蜂负y鍏冿紝鍒 20x+15y+(20*2-15)(y-0.6)=145 20x+(20*2-20)(x-0.4)+15y+(20-15)(y-0.6)=129 涓婇潰鐨勬柟绋嬬粍鏁寸悊寰 x+2y=8 2x+y=7 鑱旇В涓婇潰鐨勬柟绋嬬粍寰梮=2锛寉=3 鍗矨鍨嬫瘺绗旂殑闆跺敭浠蜂负2鍏冿紝B鍨嬫瘺绗旂殑闆跺敭浠蜂负3鍏 ...
