x+4/9=3/5 9/10-x=3/5 x+7/18=5/9 7/16+x=5/24 x-(4/7-1/3)=19/2
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x+4/9=3/5 9/10-x=3/5 x+7/18=5/9 7/16+x=5/24 x-(4/7-1/3)=19/21 8/15+x=5/6 解方程如题
x+4/9=3/5 X=3/5-4/9 X=7/45 9/10-x=3/5 X=9/10+3/5 X=15/10 x+7/18=5/9 X=5/9-7/18 X=1/6 7/16+x=5/24 X=5/24-7/16 X=-11/24 x-(4/7-1/3)=19/21 X-5/21=19/21 X=5/21+19/21 X=8/7 8/15+x=5/6 X=5/6-8/15 X=3/10
x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少?
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),
1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550
(1) x-3/x-2 - x-5/x-4=x-7/x-6 - x-9/x-8
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
解方程:(x+3)/(x+2)-(x+5)/(x+4)=(x+7)/(x+6)-(x+9)/(x+8)
|X-1|+|X-2|+|X-3|+|X-4|+|X-5|+|X-6|+|X-7|+|X-8|+|X-9|+|X-10|
解分式方程 x-7/x-9+x-3/x-5=x-4/x-6+x-6/x-8
a*b=2×a+b 计算x*2x*3x*4x*5x*6x*7x*8x*9x=3039 x=
0.75x-1/2x=-5;3x+5=4x+1;3X+5=4X+18;1-7x=x-7;9x+8-7x=3x;-(x-2