1.求适合不等式1-2x/3>-2的所有非负整数解
2.
1.求适合不等式1-2x/3>-2的所有非负整数解
2.
1。X(X-1)+1(X-1)-2>X2+3X
X2-X+X-1-2>X2+3X
-3>3X
-1>X
2. 6(0.2X+0.3)-0.2(X+1)<1
1.2X+1.8-0.2X-0.2<1
X+1.6<1
X<-0.6
1。X(X-1)+1(X-1)-2>X2+3X
X2-X+X-1-2>X2+3X
-3>3X
-1>X
2. 6(0.2X+0.3)-0.2(X+1)<1
1.2X+1.8-0.2X-0.2<1
X+1.6<1
X<-0.6
x<9/2,非负整数解是0,1,2,3,4
x<-1
x<16/5
好象很简单
1、X^2-1-2>x^2+3x
3x<-3
X<-1
2、3x-9-x-1<6
2x<16
x<8
1-2x/3>-2
X<9/2
X可以是4 3 2 1 0