4(2x-7)-2(x-1)=3(x-1)-2
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已知f(x-1)=x²+4x-5则f(x)的表达式是() A x²+6x B x²+8x+7已知f(x-1)=x²+4x-5则f(x)的表达式是()A x²+6xB x²+8x+7C x²+2x-3D x²++6x-10
x+2/x+3-x+1/x+2=x+8/x+9-x+7/x+8
化简:(x+3) / x^2-3x - x-1 / x^2-6x+9)除以x-9 / 3X-x^2怎么化?
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
*-----------------------------------------------*| 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 ||
x²+1/x²-3(x+1/x)+4=0 3x²-12x-2√(x²-4x+7)+13=0要答题过程,
3x²-(2x+5x-1),其中x=10
3×(x+1)+4x+8=4(x+1)+5x-7
4x-2=3x+1 -x+3=10 x-7=11-x x=四分之一x+6
求lim(x趋向于1)(x+x^2+x^3+...+x^n-n)/(x-1)
求lim(x趋向于1)(x+x^2+x^3+...+x^n-n)/(x-1)
(6√x/4-2x√1/x)÷3√x 化简
多项式x^4+2x^3-4x^2-2x+3与x^3+4x^2+x-6的最大公因式是什么x^4+2x^3-4x^2-2x+3=(x^4+3x^3)-x(x^2+4x+3)+(x+3)=x^3(x+3)-x(x+1)(x+3)+(x+3)=(x+3)[x^3-x(x+1)+1]=(x+3)[x^3+1-x(x+1)]=(x+3)[(x+1)(
(1)x÷x=x x= (2)x2=2x x= (3(1)x÷x=x x=(2)x2=2x x=(3)x=x-x x=
(x方-4x+2)(x方-4x+5)+2能分别被x-1,x-2,x-3整除
(1) √3_____{x|x≤2},(1,2)____{(x,y)|(1) √3_____{x|x≤2},(1,2)____{(x,y)|y=x+1}(2) √2+√5_____{x|x≤2+√3}(3) {x|x/1=x,x∈R}______{x|x的立方-x=0}(4)设U=R,A={x|a≤x≤b}
计算:2x/(x-2)(x+1)÷(1-x/x+1)-x²+2x/x²-4?
计算题:已知x+1/x=3,求:①x²+1/x² ②x²/x^4+x²+1 ③2x²-5x-2+3/x²+1已知x+1/x=3,求:①x²+1/x² ②x²/(x^4+x²+1) ③2x²-5x-2+3/(x²+1 )主要是第三问,