(x+2)(3x+4)<0

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(x+2)(3x+4)<0

(x+2)(3x+4)<0
(x+2)(3x+4)<0
 

(x+2)(3x+4)<0

 

(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 3x/(x-2)-x/(x+2)÷2x/(x-4)化简3x/(x-2)-x/(x+2)÷2x/(x²-4)化简 (x方-3x+2)(-x方+2x+3)<0,求x解集 求最大值 y=x+4/x (x<0) y=(x+1)/(x²+2x+3) (x>-1) 已知1/√(x)+√(x)=√5,求√(x/x2+x+1)+√(x/x2-x+1)的值定义域 x>0,两边平方,x+2+1/x=5,x+1/x=3,x^2-3x+1=0,x^2+x+1-4x=0,x^2+x+1=4x,x^2-x+1-2x=0.x^2-x+1=2x,√[x/(x^2+x+1)]-√[x/(x^2-x+1)]=√[x/(4x)]-√[x/2x]=√(1/4)-√(1/2) (x-1)^3(x+1)(x-2)/(x+4) f(x)=(x^3-2)/[2(x-1)^2]求导f'(x)=[6x²(x-1)²-4(x³-2)(x-1)]/[2(x-1)²]²>0即 6x²(x-1)²-4(x³-2)(x-1)>0 (x-1)[6x²(x-1)-4(x³-2)]>0 (x-1)[6x³-6x²-4x³+8]>0 (x-1)(x³-3x²+4)>0 (x- (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) 两道初二数学计算题(1)x+6/x^2+2x+1-x+4/x^2+x=0(2)x+3/x÷x^2+3x/x-3·1/3-x 计算(x*x+4x+5)/(x+2)-(x*x+6x+10)/(x+3)+1 一元二次方程解答!x(5x+4)=5x+44x^2-45=31x-3x^2+22x-24=0(x+8)(x+1)= -12(3x+2)(x+3)=x+14 1、1/2x=2/x+32、x/x+1=(2x/3x+3)+13、2/x-1=4/x²-14、5/x²+x-1/x²-x=0 (x+1)(x+2)(x+3)(x+4)+1(x+1)(x-2)(x+3)(x-4)+25 解方程:(x-8)/(x-3)-(x-9)/(x-4)=(x+7)/(x+8)-(x+2)/(x+3) lim(4x^3-2x^2+x)/(3x^2+2x)=?(x->0) 证明f(x)={x-2x+3(x>0) 0(x=0) -x-2x-3(x<0)}是奇函数 证明f(x)={x-2x+3(x>0) 0(x=0) -x-2x-3(x<0)}是奇函数