解方程不等式？ 解不等式方程
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x²-3x+2＜0
∴（x-1)(x-2)<0
∴1＜X＜2
∴解集为﹛X│1＜X＜2﹜
通常不等式中的数是实数，字母也代表实数，不等式的一般形式为F(x，y，……，z)≤G(x，y，……，z )（其中不等号也可以为<，≥，> 中某一个），两边的解析式的公共定义域称为不等式的定义域，不等式既可以表达一个命题，也可以表示一个问题。
①如果x>y，那么y<x；如果y<x，那么x>y；
②如果x>y，y>z；那么x>z；
③如果x>y，而z为任意实数或整式，那么x+z>y+z；
④ 如果x>y，z>0，那么xz>yz；如果x>y，z<0，那么xz<yz;
⑤如果x>y，z>0,那么x÷z>y÷z;如果x>y，z<0,那么x÷z<y÷z。
扩展资料：
解不等式组步骤：
1.分别将不等式组中的各不等式设上①②③....
2.分别解出不等式
格式为：解①得....解②得...
3.可以在数轴上分别表示出来。
4.将原来的解联立起来形成解集。
5.若无解，则写上：此不等式组无解。
如果不等式F（x）<G（x） 的定义域被解析式H（x）的定义域所包含，并且H（x）>0，那么不等式F(x)<G（x）与不等式H（x）F（x）<H（ x ）G（x） 同解；如果H（x）<0，那么不等式F（x）<G（x）与不等式H (x)F（x）>H（x）G（x）同解。
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绛旓細涓嶇瓑寮忔柟绋鐨勮В娉曟槸鍘诲垎姣嶃佸幓鎷彿銆佺Щ椤广佸悎骞跺悓绫婚」銆佺郴鏁板寲涓1鍗冲彲锛屼竴鑸湴锛岀敤绾补鐨勫ぇ浜庡彿鈥>鈥濄佸皬浜庡彿鈥
绛旓細鏈鍩烘湰鐨勬槸涓嶇瓑寮鐨勬ц川锛氫笉绛夊紡鎬ц川1 涓嶇瓑寮忕殑涓よ竟鍚屾椂鍔犱笂锛堟垨鍑忓幓锛夊悓涓涓暟鎴栧悓涓涓惈鏈夊瓧姣嶇殑寮忓瓙锛屼笉绛夊彿鐨勬柟鍚戜笉鍙橈紝鍗筹細濡傛灉a锛瀊,閭ｄ箞a+m锛瀊+m锛宎-m锛瀊-m锛涘鏋渁锛渂,閭ｄ箞a+m锛渂+m锛宎-m锛渂-m銆備笉绛夊紡鎬ц川2 涓嶇瓑寮忕殑涓よ竟鍚屾椂涔樹互锛堟垨闄や互锛夊悓涓涓鏁帮紝涓嶇瓑鍙风殑鏂瑰悜涓嶅彉锛屽嵆...
绛旓細鐢卞紡1寰 x+1<0 瑙ｅ緱x<-1 鐢卞紡2寰 2x<2 瑙ｅ緱x<1 缁煎悎寰 x<-1 瑙3 鐢卞紡1寰 1/2x>=1/2 瑙ｅ緱 x>=1 鐢卞紡2寰 3x>6 瑙ｅ緱 x>2 缁煎悎寰 x>2 瑙4 鐢卞紡1寰 3x-2x<-6 瑙ｅ緱x<-6 鐢卞紡2寰 2x-6-3x+6<0 瑙ｅ緱x>0 缁煎悎寰楁鏂圭▼缁勬棤瑙 ...
