5x-18.5=0 3.6x7-6x=9.6 3.4x-48=26.8 42x+25x=134 0.8x÷ 9=2.7
5x-18.5=0 3.6x7-6x=9.6 3.4x-48=26.8 42x+25x=134 0.8x÷ 9=2.7
解方程 2.7x+3=97.5 0.95÷0.4x=1.9 6.8+x=24.5 6x-4x7.5=24 4.8x-8=
(X+X)+(X-X)+(X*X)+(X/X)=100
(4.5-x)X7=17.
x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少?
x-4/x-5 - x-5/x-6=x-7/x-8 - x-8/x-9求x=?
用递归法求y=x-(x*x*x/3!)+(x*x*x*x*x/5!)-(x*x*x*x*x*x*x/7!)+.
48-x+3x7=36 解方程
y=(x-1)(x-2)(x-3)(x-4)(x-5)(x-6)(x-7)(x-8)(x-9)(x-10)的导数在x=1
设函数f(x)=(x-1)(x-2)(x-3)(x-4)(x-5)(x-6)(x-7)(x-8)(x-9)(x-10),
已知1+x+x^2+x^3=0,求x+x^2+x^3+x^4+x^5+x^6+x^7+x^8的值
(x+7/x+6)+ (x+9/+x+8)=(x+10/x+9)+(x+6/x+5)