3.5x+x=0.9 7.2(x-5)=1.443.5x+x=0.97.2(x-5)=1.442.5x+7.5=12.5

3.5x+x=0.9 7.2(x-5)=1.443.5x+x=0.97.2(x-5)=1.442.5x+7.5=12.5 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!)+. （X+X)+(X-X)+(X*X)+(X/X)=100 x-三分之一x-四分之一x(x-三分之一x)=5 x*x*x*x*x=80000? x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少? 解方程x/(x-2)=2x/(x-3)+(1-x)/(x-5x+6) (x+12)(x-2)+(x+7)(x+8)-(x+5)(x-10),其中x=2 x-2x+3x-4x+5x.+99x-100x=25求解 x.x-5x+1=0,那么x.x+1/x.x 2x+3x+4x+5x+x+6x+7x=100 x(x-2)-2x(x+1)-3x(x-5) 其中x=负½ (x-3/x-2)-(x-2/x-1)=(x-5/x4) -(x-4/x-3) x(x+1)+(x+2)+(x+3)+(x+4)+(x+5) = 27求x 3.5x-x=7.x=? f(x,-x)=x^2+2x,fx(x,-x)=5x+1,则fy(x,-x)= x-4/x-5 - x-5/x-6=x-7/x-8 - x-8/x-9求x=? 3x-x=0.9求x