8Xx(2X-1)-2x(X-1)=4X+58
有例子x²+6x-7|| ||x × 7=7x\ =6xx × -1=-x/(x-1)(
解决数独问题x 1 x 7 x x x 3 xx x x x 4 x 2 x x9 x 3 6 x 8 7 x 58 x
已知函数f(x)=xx-3x,x属于{-3,-2,-1,0,1},求函数的定义域和值域.
化简求值 :2x(x²-x+1)-x(2x²+2x-3) x=﹣二分之一
x+2/x+3-x+1/x+2=x+8/x+9-x+7/x+8
题目是 (1) XX*X=XX X*X=XX X为未知数分别将1到9的9个数填入不能重复 *为乘号 (2)XX/X=X
计算:2x/(x-2)(x+1)÷(1-x/x+1)-x²+2x/x²-4?
(1) x-3/x-2 - x-5/x-4=x-7/x-6 - x-9/x-8
解方程1/(xx+x)+1/(xx+3x+2)+1/(xx+5x+6)+1/(xx+7x+12)+1/(xx+9x+20
用公式法解下列方程x²-4x+1=0-5x²-3x+2=02(x²-2)+2x=x(3x-
15-(7-4x)=2x+(5-2x) 4分之X减8分之3X减1=1 0.7分之X-0.03分之0.17-0.2X=1
3x-4(2x+5)=7(x-5)+4(2x+1)