1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550
已知 X=4- 根号3 求 (X*X*X*X-6X*X*X-2X*X+18X+23) / (X*X-8X+15)的值
x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少?
(x+12)(x-2)+(x+7)(x+8)-(x+5)(x-10),其中x=2
x-4/x-5 - x-5/x-6=x-7/x-8 - x-8/x-9求x=?
x+15%x=3.22 ,1/2x-25%x=10 ,x*(1-37.7%)=5/8 ,40%x=16 ,19-120%
(2x^-5x+2/6x^+13x+6)*(6x^-5x-6/6x^-17x+10)*(12x^+8x-15/2x^-x
解方程:25%x=75 60%x-35%x=125 x-40%x=120 x+15%x=115 15x-30=150 8
四道方程:2x+6=5x 6x-28=2x 8(x-3.6)=0.8x 15x-110+7x=110
15x=23x-24 12+5x=3x-8 3(x-3)=9-(x+6)解 4+x=4x-17解
X-5+8*X=7*X-2*X-1
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