1.44加6分之一等于多少
来源:学生作业帮助网 编辑:作业帮 时间:2024/11/12 23:07:50
七十二分之29
71分之1
1/3+1/4=4/12+3/12=7/12
原式=1/(1x3)+1/(3x5)+1/(5x7)+1/(7x9)+1/(9x11)+1/(11x13)+1/(13x15)+1/(15x17)=(1-2/3)+(2/3-3/5)+(3/5-4/7
1/6+1/12+1/20+1/30+1/42+1/56+1/72+1/90=(1/2-1/3)+(1/3-1/4)+(1/4-1/5)+(1/5-1/6)+(1/6-1/7)+(1/7-1/8)+(
等于255/256
不晓得 你是不是少了个1/30若果是就再加1/30 如过不是就是这个答案
1-1/2+1/3-1/6=1+1/3-(1/2+1/6)=4/3-2/3=2/3
=1/1×2+1/2×3+1/3×4+1/4×5+1/5×6+1/6×7+1/7×8+1/8×9+1/9×10=1-1/2+1/2-1/3+1/3-1/4+1/4-1/5+1/5-1/6+1/6-1/
1/2=1/1-1/21/6=1/2-1/31/12=1/3-1/41/20=1/4-1/51/50=1/5-1/6则这些和=1/1-1/6=5/6
=1-1/2+1/2-1/3+1/3-1/4+1/4-1/5+1/5-1/6+1/6-1/7=1-1/7=6/7
您好!公式:1/[n*(n+1)]=1/n-1/(n+1)原式=1/2+1/6+1/12+1/20+1/30=1/(1*2)+1/(2*3)+1/(3*4)+1/(4*5)+1/(5*6)=(1-1/
没有简便方法!通分母=(1/9)(1+1/11+1/111+1/1111)=(1/9)(101/1111+112/111+1/1111)=(1/9)(102/1111+112/111)=135754/
原式=1/(6*7)+1/(7*8)+1/(8*9)+1/(9*10)+1/(10*11)+1/(11*12)=(1/6-1/7)+(1/7-1/8)+(1/8-1/9)+(1/9-1/10)+(1/
你先要好好掌握规律,你看1/3,1/5,1/35,1/63,1/99有什么规律么?规律是:1/3=1-2/3,1/15=2/3-3/5,1/35=3/5-4/7,1/63=4/7-5/9,1/99=5
13/36
再答:采纳再问:6分之5减3分之一再答:
这个不难掌握方法就行