求未知数x 3×x=1/10 x×9=12/13 21×x=70/33 22x=33/45 5x=4/15 7x=28/
求未知数x 3×x=1/10 x×9=12/13 21×x=70/33 22x=33/45 5x=4/15 7x=28/
1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550
求未知数:x:x=10
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!)+.
1X?+2X?+3X?+4X?+5X?+6X?+7X?+8X?+9X?+10X?=1980求?是多少
x-x/5=2.4 (求未知数x) 12÷5%x=8 4x+x=12.5
4x+2=2x+18 求未知数x
3X+2=X+20求X Y未知数
求未知数x.9X-3.2X=8.12 15分之4:X=1.36:17
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),
3x²-{7x-(4x-3)-2x²=?注:x=未知数.