x/25=2.8:4/5.1.2/75=0.7:x.0.36:x=1/10:4/9
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x/25=2.8:4/5.1.2/75=0.7:x.0.36:x=1/10:4/9
![x/25=2.8:4/5.1.2/75=0.7:x.0.36:x=1/10:4/9](/uploads/image/z/6958042-34-2.jpg?t=x%2F25%3D2.8%3A4%2F5.1.2%2F75%3D0.7%3Ax.0.36%3Ax%3D1%2F10%3A4%2F9)
4/5X=25x2.8X=87.5 再答: 1.2X=75x0.7 x=43.75
再问: 还有一个
再答: 1/10X=0.36x4/9 X=1.6
再答: 送个物品给我嘛?
再答: 送个物品给我嘛?
再问: 什么物品
再答: 12色水彩笔
再问: 还有一个
再答: 1/10X=0.36x4/9 X=1.6
再答: 送个物品给我嘛?
再答: 送个物品给我嘛?
再问: 什么物品
再答: 12色水彩笔
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),
x/25=2.8:4/5.1.2/75=0.7:x.0.36:x=1/10:4/9
1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550
解方程(x/x(x+2))+(x/(x+2)(x+4))+.+x/(x+8)(x+10)=1
1x()+2x()+3x()+4x()+5x()+6x()+7x()+8x()加9x()+10x()=1980
1X?+2X?+3X?+4X?+5X?+6X?+7X?+8X?+9X?+10X?=1980求?是多少
x^5+x^4 = (x^3-x)(x^2+x+1)+x^2+x
解方程:(2x+5)(4x*x-10x+25)=8x(x*x+1)
(4x+2)/x+(4x-22)/(x-5)=(x-6)/(x-4)+(7x+9)/(x+1)
(1) x-3/x-2 - x-5/x-4=x-7/x-6 - x-9/x-8
x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少?