图片是已知的，题是：若3a加6b的值与x的取值无关，求y的值 已知，且3a 6b的值与x无关，求y的值
\u82e53a+6b\u7684\u503c\u4e0ea\u7684\u53d6\u503c\u65e0\u5173\uff0c\u6c42b\u7684\u503c\u7ed3\u679c\u4e3a\uff1a2/5\u3002
\u89e3\u9898\u8fc7\u7a0b\uff1a
\u6269\u5c55\u8d44\u6599\u8fd0\u7b97\u6cd5\u5219\uff1a
\u5408\u5e76\u540c\u7c7b\u9879\uff1a\u628a\u591a\u9879\u5f0f\u4e2d\u540c\u7c7b\u9879\u5408\u5e76\u6210\u4e00\u9879\uff0c\u53eb\u505a\u5408\u5e76\u540c\u7c7b\u9879\u3002\u5408\u5e76\u540c\u7c7b\u9879\u7684\u6cd5\u5219\u662f\uff1a\u540c\u7c7b\u9879\u7684\u7cfb\u6570\u76f8\u52a0\uff0c\u6240\u5f97\u7684\u7ed3\u679c\u4f5c\u4e3a\u7cfb\u6570\uff0c\u5b57\u6bcd\u548c\u5b57\u6bcd\u7684\u6307\u6570\u4e0d\u53d8\u3002
\u53bb\u62ec\u53f7\u6cd5\u5219\uff1a\u62ec\u53f7\u524d\u8db3\u201c+\u201d\u53f7\uff0c\u628a\u62ec\u53f7\u548c\u5b83\u524d\u9762\u7684\u201c+\u201d\u53f7\u53bb\u6389\uff0c\u62ec\u53f7\u91cc\u5404\u9879\u90fd\u4e0d\u53d8\u7b26\u53f7\uff1b\u62ec\u53f7\u524d\u662f\u201c\u2014\u201d\u53f7\uff0c\u628a\u62ec\u53f7\u548c\u5b83\u524d\u9762\u7684\u201c\u2014\u201d\u53f7\u53bb\u6389\uff0c\u62ec\u53f7\u91cc\u5404\u9879\u90fd\u6539\u53d8\u7b26\u53f7\u3002
\u6dfb\u62ec\u53f7\u6cd5\u5219\uff1a\u6dfb\u62ec\u5bfc\u540e\uff0c\u62ec\u53f7\u524d\u9762\u662f\u201c+\u201d\u53f7\uff0c\u62ec\u5230\u62ec\u53f7\u91cc\u7684\u5404\u9879\u90fd\u4e0d\u53d8\u7b26\u53f7\uff1b\u6dfb\u62ec\u53f7\u540e\uff0c\u62ec\u53f7\u524d\u9762\u662f\u201c\u2014\u201d\u53f7\uff0c\u62ec\u5230\u62ec\u53f7\u91cc\u7684\u5404\u9879\u90fd\u6539\u53d8\u7b26\u53f7\u3002
\u6027\u8d28\uff1a
1\u3001\u4e24\u5b57\u6bcd\u76f8\u4e58\u3001\u6570\u5b57\u4e0e\u5b57\u6bcd\u76f8\u4e58\u3001\u5b57\u6bcd\u4e0e\u62ec\u53f7\u76f8\u4e58\u4ee5\u53ca\u62ec\u53f7\u4e0e\u62ec\u53f7\u76f8\u4e58\u65f6\uff0c\u4e58\u53f7\u90fd\u53ef\u4ee5\u7701\u7565\u4e0d\u5199.\u5982\uff1a\u201cx\u4e0ey\u7684\u79ef\u201d\u53ef\u4ee5\u5199\u6210\u201cxy\u201d\uff1b\u201ca\u4e0e2\u7684\u79ef\u201d\u5e94\u5199\u6210\u201c2a\u201d\uff0c\u201cm\u3001n\u7684\u548c\u76842\u500d\u201d\u5e94\u5199\u6210\u201c2(m+n)\u201d\u3002
2\u3001\u5b57\u6bcd\u4e0e\u6570\u5b57\u76f8\u4e58\u6216\u6570\u5b57\u4e0e\u62ec\u53f7\u76f8\u4e58\u65f6\uff0c\u4e58\u53f7\u53ef\u7701\u7565\u4e0d\u5199\uff0c\u4f46\u6570\u5b57\u5fc5\u987b\u5199\u5728\u524d\u9762.\u4f8b\u5982\u201cx\u00d72\u201d\u8981\u5199\u6210\u201d2x\u201d\uff0c\u4e0d\u80fd\u5199\u6210\u201cx2\u201d\uff1b\u201c\u957f\u3001\u5bbd\u5206\u522b\u4e3aa\u3001b\u7684\u957f\u65b9\u5f62\u7684\u5468\u957f\u201d\u8981\u5199\u6210\u201c2(a+b)\u201d\uff0c\u4e0d\u80fd\u5199\u6210\u201c(a+b)2\u201d\u3002
3\u3001\u4ee3\u6570\u5f0f\u4e2d\u4e0d\u80fd\u51fa\u73b0\u9664\u53f7\uff0c\u76f8\u9664\u5173\u7cfb\u8981\u5199\u6210\u5206\u6570\u7684\u5f62\u5f0f
4\u3001\u6570\u5b57\u4e0e\u6570\u5b57\u76f8\u4e58\u65f6\uff0c\u4e58\u53f7\uff08\u4e5f\u53ef\u4ee5\u5199\u4f5c \u00b7 \uff09\u4ecd\u5e94\u4fdd\u7559\u4e0d\u80fd\u7701\u7565\uff0c\u6216\u76f4\u63a5\u8ba1\u7b97\u51fa\u7ed3\u679c.\u4f8b\u5982\u201c3\u00d77xy\u201d\u4e0d\u80fd\u5199\u6210\u201c37xy\u201d\uff0c\u6700\u597d\u5199\u6210\u201c21xy\u201d\u3002
\u89e3\uff1a\u5df2\u77e5A=2x\u7684\u5e73\u65b9+3xy-2x-1\uff0cB=-x\u7684\u5e73\u65b9+xy-1\uff0c
\u4e143A+6B\u7684\u503c\u4e0ex\u65e0\u5173\uff0c
\u5f973A+6B
=3\u00d7\uff082x\u7684\u5e73\u65b9+3xy-2x-1\uff09+6\u00d7\uff08-x\u7684\u5e73\u65b9+xy-1\uff09
=6x\u7684\u5e73\u65b9+9xy-6x-3-6x\u7684\u5e73\u65b9+6xy-6
=15xy-6x-9
=x\u00d7\uff0815y-6\uff09-9
\u5f9715y-6=0
15y=6
y=6\u00f715
y=5\u5206\u4e4b2
13
绛旓細鎵浠ワ紙a-1锛墄2鏄簩娆￠」a-1鈮0锛岃В寰梐鈮1锛涜В寰椾笉绛夊紡3a+6锛0锛屽垯a锛-2锛屼粠鑰屽緱鍒板叾瑙ｉ泦鏄痑锛-2涓攁鈮1锛庘埖锛坅-1锛墄2-5x+3=0鏄竴涓叧浜巟鐨勪竴鍏冧簩娆℃柟绋嬶紝鈭达紙a-1锛墄2鏄簩娆￠」a-1鈮0锛屸埓a鈮1锛屸埖涓嶇瓑寮3a+6锛0锛屸埓a锛-2锛屸埓涓嶇瓑寮3a+6锛0鐨勮В闆嗘槸a锛-2涓攁鈮1锛
绛旓細(1)鐢辫窛绂诲叕寮忥細d=|3a-24-2|/5=4 鈭磡3a-24-2|=20 鑻3a锛26 3a=46 a=46/3 鑻3a锛26 26-3a=20 3a=6 a=2 缁间笂鎵杩,a=46/3鎴朼=2 (2)d=|3a-24-2|/5锛4 鍗筹細|3a-24-2|锛20 鑻3a锛26,3a-26锛20 3a锛46 a锛46/3 鑻3a锛26,26-3a锛20 3a锛6 a锛2 缁间笂鎵杩...
绛旓細A澶т簬浜斿垎涔嬩笁 鍙X鍜孻鍒嗗埆绉诲埌绛夊紡涓ゆ梺锛屽氨鍙В浜
绛旓細(5-6)-(7-9) 鍒嗗埆鏍规嵁涓嬪垪鏉′欢姹備唬鏁板紡x-y-z+w鐨勫: (1)x=-3,y=-2,z=0,w=5; (2)x=0.3,y=-0.7,z=1.1,w=-2.1; 宸茬煡3a=a+a...(C) 浠绘剰涓涓嚜鐒舵暟m鍔犱笂姝ｆ暣鏁皀绛変簬m杩涜n娆″姞1杩愮畻 (D)鍒嗘暟 鐨勭壒寰佹ц川鏄畠涓庢暟m鐨勪箻绉濂界瓑浜巒 浜屻 濉┖棰:(姣忛4鍒,鍏32鍒) 11.-0.2鐨...
绛旓細宸茬煡:鈭鈭=1,鈭鈭= ,鍒(x20)3-x3y2鐨勫肩瓑浜( ) A銆- 鎴- B銆 鎴 C銆 D銆- 6銆...(3mn-2)2 涓銆佽鏍规嵁涓嬪垪姣忛鐨勫彊杩扮敾鍑虹嚎娈鍥: 1銆佺敳銆佷箼涓よ溅浠嶢銆丅涓ゅ湴鍚屾椂鐩稿寮鍑,鐢茶溅
绛旓細3a = (6,12)2b = (-2,-6)3a+2b = (6-2,12-6)=(4,6)|3a+2b| = 鈭4^2+6^2 = 鈭16+36 = 鈭52 a-c = (2+3,4-2) = (5,2)(a-c)/|a-c| = (5/鈭29,2/鈭29)
绛旓細瑙ｏ細鐢遍鎰忓緱 3a-6-a-4=0 m=(-a-4)^2 瑙ｅ緱 a=5 m=81 鎵浠鐨勫兼槸81
绛旓細c+b=3a²+6 c-b=a²+4 c=2a²+5 b=a²+1.鈭碿锛瀊锛瀉
绛旓細瑙ｆ硶濡傚浘銆
绛旓細鍐嶇敱鍏浣嶆暟鑳借3鏁撮櫎,鎺ㄧ煡 3+A+B+A+B+A=3+3A+2B鑳借3鏁撮櫎,鏁2B鑳借3鏁撮櫎銆侭鍙彇0,3,6,9杩4涓笺傜敱浜嶣鍙互鍙4涓,A鍙互鍙5涓,棰樼洰...35銆鍥涓浘(1)鍜屽浘(2)鏄袱涓舰鐘躲佸ぇ灏忓畬鍏ㄧ浉鍚岀殑澶ч暱鏂瑰舰,鍦ㄦ瘡涓ぇ闀挎柟褰㈠唴鏀惧叆鍥涗釜濡傚浘(3)鎵绀虹殑灏忛暱鏂瑰舰,鏂滅嚎鍖哄煙鏄┖涓嬫潵鐨勫湴鏂,宸茬煡澶ч暱鏂瑰舰...
