大零解为全。小于零将没有解，开口向下正相反。乘法公式平方差公式两数和乘两数差，等于两数平方差。积化和
da ling jie wei quan xiao yu ling jiang mei you jie kai kou xiang xia zheng xiang fan cheng fa gong shi ping fang cha gong shi liang shu he cheng liang shu cha deng yu liang shu ping fang cha ji hua he
曲线横轴有交点。a正开口它向上，大于零则取两边。代数式若小于零，解集交点数之间。判别式它小于零，口上
qu xian heng zhou you jiao dian a zheng kai kou ta xiang shang da yu ling ze qu liang bian dai shu shi ruo xiao yu ling jie ji jiao dian shu zhi jian pan bie shi ta xiao yu ling kou shang
根，口上大零解为全。小于零将没有解，开口向下正相反。首先化成一般式，构造函数当伙伴。判别式值若非负，
gen kou shang da ling jie wei quan xiao yu ling jiang mei you jie kai kou xiang xia zheng xiang fan shou xian hua cheng yi ban shi gou zao han shu dang huo ban pan bie shi zhi ruo fei fu
若非负，曲线横轴有交点。a正开口它向上，大于零则取两边。代数式若小于零，解集交点数之间。方程若无实数
ruo fei fu qu xian heng zhou you jiao dian a zheng kai kou ta xiang shang da yu ling ze qu liang bian dai shu shi ruo xiao yu ling jie ji jiao dian shu zhi jian fang cheng ruo wu shi shu
取两边，异向取中间。中间无元素，无解便出现。解一元二次不等式首先化成一般式，构造函数当伙伴。判别式值
qu liang bian yi xiang qu zhong jian zhong jian wu yuan su wu jie bian chu xian jie yi yuan er ci bu deng shi shou xian hua cheng yi ban shi gou zao han shu dang huo ban pan bie shi zhi
乘除负也变号。解一元一次不等式组大于头来小于尾，大小不一中间找。大大小小没有解，四种情况全来了。同向
cheng chu fu ye bian hao jie yi yuan yi ci bu deng shi zu da yu tou lai xiao yu wei da xiao bu yi zhong jian zhao da da xiao xiao mei you jie si zhong qing kuang quan lai le tong xiang
，同乘除负要变向。先去分母再括号，移项别忘要变号。同类各项去合并，系数化1注意了。同乘除正无防碍，同
tong cheng chu fu yao bian xiang xian qu fen mu zai kuo hao yi xiang bie wang yao bian hao tong lei ge xiang qu he bing xi shu hua 1 zhu yi le tong cheng chu zheng wu fang ai tong
先行。符号法则后上阵，不等式组解集并。啊里巴巴解一元一次不等式先去分母再括号，移项合并同类项。系数化1有讲究
xian hang fu hao fa ze hou shang zhen bu deng shi zu jie ji bing a li ba ba jie yi yuan yi ci bu deng shi xian qu fen mu zai kuo hao yi xiang he bing tong lei xiang xi shu hua 1 you jiang jiu
乘正数不变号，乘负变号别忘了。不等量加不等量，大量和它仍然大。解分式不等式欲解分式不等式，移项化简要
cheng zheng shu bu bian hao cheng fu bian hao bie wang le bu deng liang jia bu deng liang da liang he ta reng ran da jie fen shi bu deng shi yu jie fen shi bu deng shi yi xiang hua jian yao
式，对立统一共同体。不等号连代数式，便可称为不等式。不等啊里巴巴式的单调性不等量若加等量，原来大的仍然大。同
shi dui li tong yi gong tong ti bu deng hao lian dai shu shi bian ke cheng wei bu deng shi bu deng a li ba ba shi de dan diao xing bu deng liang ruo jia deng liang yuan lai da de reng ran da tong
有时内项会相同，比例中项出现了。同数平方等异积，比例中项无处逃。不等式及不等式的解不等式等式以及不等
you shi nei xiang hui xiang tong bi li zhong xiang chu xian le tong shu ping fang deng yi ji bi li zhong xiang wu chu tao bu deng shi ji bu deng shi de jie bu deng shi deng shi yi ji bu deng
到。有时内项会相同，比例中项少不了。比例中项很重要，多种场合会碰到。成比例的四项中，外项相同有不少。
dao you shi nei xiang hui xiang tong bi li zhong xiang shao bu le bi li zhong xiang hen zhong yao duo zhong chang he hui peng dao cheng bi li de si xiang zhong wai xiang xiang tong you bu shao
四式是否成比例，生或降幂先啊里巴巴排序。两端积等中间积，四式便可成比例。比例中项成比例的四项中，外项相同会遇
si shi shi fou cheng bi li sheng huo jiang mi xian a li ba ba pai xu liang duan ji deng zhong jian ji si shi bian ke cheng bi li bi li zhong xiang cheng bi li de si xiang zhong wai xiang xiang tong hui yu
成反比。判断四数成比例四数是否成比例，递增递减先排序。两端积等中间积，四数一定成比例。判断四式成比例
cheng fan bi pan duan si shu cheng bi li si shu shi fou cheng bi li di zeng di jian xian pai xu liang duan ji deng zhong jian ji si shu yi ding cheng bi li pan duan si shi cheng bi li
定变量成正比，积定变量成反比。正比例与反比例变化过程商一定，两个变量成正比。变化过啊里巴巴程积一定，两个变量
ding bian liang cheng zheng bi ji ding bian liang cheng fan bi zheng bi li yu fan bi li bian hua guo cheng shang yi ding liang ge bian liang cheng zheng bi bian hua guo a li ba ba cheng ji yi ding liang ge bian liang
值，多种途径可利用。活用比例七性质，变量替换也走红。消元也是好办法，殊途同归会变通。正比例与反比例商
zhi duo zhong tu jing ke li yong huo yong bi li qi xing zhi bian liang ti huan ye zou hong xiao yuan ye shi hao ban fa shu tu tong gui hui bian tong zheng bi li yu fan bi li shang
相等合分比。前项和比后项和，比值不变叫等比。解比例外项积等内项积，列出方程啊里巴巴并解之。求比值由已知去求比
xiang deng he fen bi qian xiang he bi hou xiang he bi zhi bu bian jiao deng bi jie bi li wai xiang ji deng nei xiang ji lie chu fang cheng a li ba ba bing jie zhi qiu bi zhi you yi zhi qu qiu bi
便要称其为反比。前后项和比后项，比值不变叫合比。前后项差比后项，组成比例是分比。两项和比两项差，比值
bian yao cheng qi wei fan bi qian hou xiang he bi hou xiang bi zhi bu bian jiao he bi qian hou xiang cha bi hou xiang zu cheng bi li shi fen bi liang xiang he bi liang xiang cha bi zhi
比，两比相等叫比例。外项积等内项积，等积可化八比例。分别交换内外项，统统都要叫更比啊里巴巴。同时交换内外项，
bi liang bi xiang deng jiao bi li wai xiang ji deng nei xiang ji deng ji ke hua ba bi li fen bie jiao huan nei wai xiang tong tong dou yao jiao geng bi a li ba ba tong shi jiao huan nei wai xiang
标签：初中数学知识口诀 原创中学数学知识口诀汇编上海市同洲模范学校宋立峰比和比例比和比例两数相除也叫
biao qian chu zhong shu xue zhi shi kou jue yuan chuang zhong xue shu xue zhi shi kou jue hui bian shang hai shi tong zhou mo fan xue xiao song li feng bi he bi li bi he bi li liang shu xiang chu ye jiao