4/5×(-5/4) 4/5X(-25/6)X(-7/10) (-24/13)X(-16/7)X0X4/3 5/4X(-

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4/5×(-5/4) 4/5X(-25/6)X(-7/10) (-24/13)X(-16/7)X0X4/3 5/4X(-1.2)X(-1/9) (-3/7)X(-1/2)X(-8/15)过程
4/5×(-5/4) 4/5X(-25/6)X(-7/10) (-24/13)X(-16/7)X0X4/3 5/4X(-1.2)X(-1/9) (-3/7)X(-1/2)X(-8/15)求过程速度急啊真的!过程啊

4/5×(-5/4)
=-4/5×5/4
=-1
4/5X(-25/6)X(-7/10)
=4/5X25/6X7/10
=(4X25X7)/(5X6X10)
=(100X7)/(3X100)
=7/3
(-24/13)X(-16/7)X0X4/3
=0
5/4X(-1.2)X(-1/9)
=5/4X1.2X1/9
=5/4X6/5X1/9
=3/2X1/9
=2/3
(-3/7)X(-1/2)X(-8/15)
= -3/7X1/2X8/15
= -(3X1X8)/(7X2X15)
= -8/(7X2X5)
= -8/70

4/5×(-5/4) 4/5X(-25/6)X(-7/10) (-24/13)X(-16/7)X0X4/3 5/4X(- |X-1|+|X-2|+|X-3|+|X-4|+|X-5|+|X-6|+|X-7|+|X-8|+|X-9|+|X-10| 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 2x+3x+4x+5x+x+6x+7x=100 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+2x-3x-4x+5x+6x-7x.-196x+197x+198x-199x-200x 等于多少 1x()+2x()+3x()+4x()+5x()+6x()+7x()+8x()加9x()+10x()=1980 (x+1)(x+2)(x+3)(x+4)(x+5)(x+6)(x+7)(x+8)(x+9)(x+10)请化简 1X?+2X?+3X?+4X?+5X?+6X?+7X?+8X?+9X?+10X?=1980求?是多少已知1+x+x^2+x^3=0,求x+x^2+x^3+x^4+x^5+x^6+x^7+x^8的值