1-(10/21-3/14) 3/8+(11/12-7/20) 2/3-7/12+4/5 x-3/8-1/8=11/18

来源：学生作业帮编辑：神马作文网作业帮分类：数学作业时间：2024/11/12 09:03:34

1-(10/21-3/14) 3/8+(11/12-7/20) 2/3-7/12+4/5 x-3/8-1/8=11/18 2/3-x-1/4=1/3 2x-6/7=1/7
7/9-x+5/6=1又 5/18 x+5/12=1/2+5/9 要过成

1-(10/21-3/14) =1-(20/42-9/42)=1-11/42=31/42
3/8+(11/12-7/20)=3/8+55/60-21/60=3/8+34/60=3/8+17/30=45/120+68/120=113/120
2/3-7/12+4/5 =8/12-7/12+4/5=1/12+4/5=5/60+48/60=53/60
x-3/8-1/8=11/18
x=11/18+1/2=11/18+9/18=20/18=10/9
2/3-x-1/4=1/3
x=2/3-1/4-1/3=1/3-1/4=4/12-3/12=1/12
2x-6/7=1/7
2x=1/7+6/7=1
x=1/2
7/9-x+5/6=1又 5/18
x=7/9+5/6-23/18=14/18+15/18-23/18=6/18=1/3
x+5/12=1/2+5/9
x=1/2+5/9-5/12=6/12-5/12+5/9=1/12+5/9=3/36+20/36=23/36

1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550 |X-1|+|X-2|+|X-3|+|X-4|+|X-5|+|X-6|+|X-7|+|X-8|+|X-9|+|X-10| 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), 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 2x平方+3x=3 (用配方) x(2x-5)=4x-10 x平方+5x+7=3x+11 1-8x+16x平方=2-8x 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（1） x-3/x-2 - x-5/x-4=x-7/x-6 - x-9/x-8 (X+2)/(X+1)-(X+4)/(X+3)=(X+6)/(X+5)-(X+8)/(X+7) 解方程 x+2/x+1+x+8/x+7=x+6/x+5+x+4/x+3