1/1x2+1/2x3+1/3x4+1/4x5+1/5x6+1/6x7+1/7x8+1/8x9=?
来源:学生作业帮 编辑:搜搜做题作业网作业帮 分类:数学作业 时间:2024/07/15 21:21:58
1/1x2+1/2x3+1/3x4+1/4x5+1/5x6+1/6x7+1/7x8+1/8x9=?
急!
急!
![1/1x2+1/2x3+1/3x4+1/4x5+1/5x6+1/6x7+1/7x8+1/8x9=?](/uploads/image/z/18254525-5-5.jpg?t=1%2F1x2%EF%BC%8B1%2F2x3%EF%BC%8B1%2F3x4%EF%BC%8B1%2F4x5%EF%BC%8B1%2F5x6%EF%BC%8B1%2F6x7%EF%BC%8B1%2F7x8%EF%BC%8B1%2F8x9%EF%BC%9D%3F)
=1-1/2+1/2-1/3+1/3-1/4+1/4-1/5+1/5-1/6+1/6-1/7+1/7-1/8+1/8-1/9
=1-1/9
=8/9
=1-1/9
=8/9
计算:1/1x2+1/2x3+1/3x4+1/4x5+1/5x6+1/6x7+1/7x8+1/8x9+1/9x10.
2x2/1x3+4x4/3x5+6x6/5x7+8x8/7x9+10x10/9x11+12x12/11x13 仔细看看
x8+x7+x6+x5+x4+x3+x2+x+1因式分解
某同学做一道数学题:当x=-1时,求10x9+9x8+8x7+7x6+6x5+5x4+4x3+3x2+2x+1的值,由于
小明做一道数学题,“求代数式10x9+9x8+8x7+7x6+6x5+5x4+4x3+3x2+2x+1,当x=-1时的值
某同学在做一道题:求代数式10x9+9x8+8x7+7x6+6x5+5x4+4x3+3x2+2x+1当x=-1时的值.由
1x2+2x4+3x6+4x8 ------------------------------- 2x3+4x6+6x9+
因式分解:X15+X14+X13+X12+X11+X10+X9+X8+X7+X6+X5+X4+X3+X2+X+1
(1x2+2x4+3x6+4x8)/(2x3+4x6+6x9+8x12)
1.如果1+X+X2+X3=0,求X+X2+X3+X4+X5+X6+X7+X8的值为?
一道数学题:如果1+x+x2+x3=0,求x+x2+x3+x4+x5+x6+x7+x8的值
1x2/1+2x3/1+3x4/1+4x5/1+5x6/1+6x7/1