7x+10x+5=4x+5=?
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7x+10x+5=4x+5=?
![7x+10x+5=4x+5=?](/uploads/image/z/19192228-52-8.jpg?t=7x%2B10x%2B5%3D4x%2B5%3D%3F)
因为7X+10X+5=4X+5
17X+5=4X+5
17X=4X
所以X=0
所以4X+5=4*0+5=5
17X+5=4X+5
17X=4X
所以X=0
所以4X+5=4*0+5=5
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-4/x-6+x-8/x-10=x-5/x-7+x-7/x-9
x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少?
1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550
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+12)(x-2)+(x+7)(x+8)-(x+5)(x-10),其中x=2
2x+3x+4x+5x+x+6x+7x=100
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-4/x-5 - x-5/x-6=x-7/x-8 - x-8/x-9求x=?
x^5+x^4 = (x^3-x)(x^2+x+1)+x^2+x