帮帮做 |-1+1/2|+|-1/2+1/3|+|-1/3+1/4|+.+|-1/9+1/10|=___
1个回答
|-1+1/2|+|-1/2+1/3|+|-1/3+1/4|+.+|-1/9+1/10|
=(1-1/2)+(1/2-1/3)+(1/3-1/4)+.+(1/9-1/10)
=1-1/10
=9/10
相关问题
|-1+1/2|+|-1/2+1/3|+|-1/3+1/4|+…+|-1/9+1/10|怎么做
(2√1+1√2)/1+(3√2+2√3)/1+(1+4√3+3√4)/1+……(10√9+9√10)/1=?
计算题:|1\3-1\2|+|1\4-1\3|+|1\5-1\4|+...+|1\10-1\9|大神们帮帮忙
1/2+(1/3+2/3)+(1/4+2/4+3/4)+.+(1/10+2/10+……+9/10)
1=1;1—4=—〔1+2〕=—3;1—4+9=1+2+3=6;1—4+9—16=—〔1+2+3+4〕=—10…….第1
1/1*2+1/2*3+1/3*4+…+1/9*10
化简:[1/(2+√2)]+[1/(3√2+2√3)]+[1/(4√3+3√4)]+……+[1/(10√9+9√10)]
(1+1/2+1/3+.1/9)*(1/2+1/3+1/4+.1/10)减(1+1/2+1/3+...+1/10)*(1
|1-1/2|+|1/2-1/3|+|1/3-1/4|+...|1/9-1/10|
(1+1/2+1/3+1/4+.+1/9)x(1/2+1/3+1/4+.+1/10)-(1+1/2+1/3+1/4+.+