6x+10*(1/12-x)+11/30=1
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6x+10*(1/12-x)+11/30=1
![6x+10*(1/12-x)+11/30=1](/uploads/image/z/18224212-4-2.jpg?t=6x%2B10%2A%281%2F12-x%29%2B11%2F30%3D1)
6x+10*(1/12-x)+11/30=1
6x+5/6-10x+11/30=1
10x-6x=25/30+11/30-1
4x=1/5
x=1/20
6x+5/6-10x+11/30=1
10x-6x=25/30+11/30-1
4x=1/5
x=1/20
1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550
x/2+x/6+x/12+x/20+x/30+x/42=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
求x^2-3x/x^2-6x+9*x^2-11x+30/x^2-5x-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),
解方程:x(x-1)/1+x(x+1)/1…+(x+9)(x+10)/1=11?12
X/2+X/6+X/12+X/20+X/30+X/42=1用简便方法解
x-1=3x+3 x-3=12-4x 6x-14=5x-10 x+1=2-4x
1+2x+3x^2+4x^3+5x^4+6x^5+7x^6+8x^7+9x^8+10x^9+11x^10当x=-1时的值
4(x+3)=2x+2 7(x-1)=2x+3 4x+20=6x-30 4x-12=2x 2x-3=x+7 3x-4=2
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