(1)3(x-1)-4(x-2)<-3 (2)3[a-2(a+1)]≤-4a

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(1)3(x-1)-4(x-2)<-3 (2)3[a-2(a+1)]≤-4a
(1)3(x-1)-4(x-2)<-3 (2)3[a-2(a+1)]≤-4a

(1)3(x-1)-4(x-2)<-3 (2)3[a-2(a+1)]≤-4a
1、3(x-1)-4(x-2)<-3
3x-3-4x+8<-3
-x+5<-3
x>8
2、3[a-2(a+1)]≤-4a
3a-6a-6≤-4a
-3a-6≤-4a
a≤6

﹙1﹚3x-3-4x+8<﹣3
﹣x<﹣8
x>8
﹙2﹚3[a-2a-2]≤﹣4a
3[﹣a-2]≤﹣4a
﹣3a-6≤﹣4a
4a-3a≤6
a≤6

第一题不成立,第二题a≤6

解九宫格题目(X为未知数)9 X 2 X 7 X 8 X XX X 4 X X 9 X 6 X1 3 X 5 X X X X 24 X X 8 5 X X 1 XX 8 9 4 X 1 6 7 XX 1 X X 3 6 X X 88 X X X X 2 X 3 6X 5 X 6 X X 9 X XX X 7 X 4 X 2 X 1 (x-1)^3(x+1)(x-2)/(x+4) (x+2)(x-2)+16 (x-1)(x-2)+3x(x+3)-4(x+2)(x-3)(x+2)(x-2)+16 (x-1)(x-2)+3x(x+3)-4(x+2)(x-3) (x+1)(x+2)(x+3)(x+4)+1(x+1)(x-2)(x+3)(x-4)+25 计算(x*x+4x+5)/(x+2)-(x*x+6x+10)/(x+3)+1 请问这道题咋做 :(x)X (x+1) X (x+2) X (x+3) =360 (X-3分之x-1-x分之x-4)除以x的平方+3x分之(x+3)(x-2),其中(x-1)(x-2)=0 解下列方程!就三道!解下列方程.1、x/x-2 - 1-x²/x²-5x = 2x/x-3(x/x-2 - 1-x²不是一起的!)2、5x/x²+x-6 - 5-2x/x²-x-12=7x-10/x²-6x+8(5x/x²+x-6 - 5-2x不是一起的!)3、x-4/x-5 + x-8/x-9=x-7/x- (1)(2x/x-1)-(x-1/x)=1 (2)(x^2-4x/x^2-1)+1=2x/x+1 (3)(x+4/x^2+2x)-(1/x+2)=(2/x)+1 (1)(2x/x-1)-(x-1/x)=1 (2)(x^2-4x/x^2-1)+1=2x/x+1 (3)(x+4/x^2+2x)-(1/x+2)=(2/x)+1 x+5/x+1-3x-3/x+5=8x+28/x^2+4X-5-2(x+5)/(x+1)-(3x-3)/(x+5)=(8x+28)/(x^2+4X-5)-2 x^2-1/x^2+4x+4÷(x+1)×x^2+3x+2/x-1计算 (x+2分之3x-x+2分之x)/x平方-4分之x(x-1)=4 2x-6/4-4x+x^2/(x+2)*x^2-4/3-x,其中x=-1 [(2x+6)/(x^2-4x+4)]×[(x-2)/(x^2+3x)]-1/x-2化简! *-----------------------------------------------*| 6 4 X | 8 X X | X X 5 || X X X | X X X | X 7 8 || X X X | X X X | X X X ||---------------+---------------+--------------- || X X X | X X X | 5 1 X || X X X | X 6 X | X X X || 8 X X | 3 5 X | 2 X X || 1.(x^3-x^2-4x+1)/(x^2-3x+2)-(x^3-2x^2-9x+21)/(x^2-5x+6)+(x^2-3x+8)/(x^2-4x+3)2.{(x^2)/(x-y)}*{y/(x+y)}-{(x^4y)/(x^4-y^4)}÷{(x^2/x^2+y^2)^2} ① x(x-3)<3x(x+2)-2x的平方-2x的平方-3 ②2(x的平方-2)-4x(1-x)≥16+6x(x-1)