/1/3-1/2/+/1/4-1/3/+/1/5-1/4/+.+/1/10-1/9/
1个回答
/1/3-1/2/+/1/4-1/3/+/1/5-1/4/+.+/1/10-1/9/
=1/2-1/3+1/3-1/4+1/4-1/5+……+1/9-1/10
=1/2-1/10
=2/5
相关问题
1/1*2*3+1/2*3*4+1/3*4*5+.+1/8*9*10
(2√1+1√2)/1+(3√2+2√3)/1+(1+4√3+3√4)/1+……(10√9+9√10)/1=?
计算:|1/3-1/2|+|1/4-1/3|+|1/5-1/4|+···+|1/10-1/9|.
根据1/2=1/5+3/10,1/3=1/7+4/21,1/4=1/9+5/36 那么1/9=1/( )+10/( ),
1/1*2*3*4+1/2*3*4*5+1/3*4*5*6+.+1/7*8*9*10
3/4-1/4-1/2=5/8-1/4-1/4=5/1+3/1+7/1=3/1-6/1-1/12=9/10-3/20-3
1.化简 |1/3-1/2|+|1/4-1/3|+|1/5-1/4|······+|1/10-1/9|
1/(1*2*3)+1/(2*3*4)+1/(3*4*5)+...+1/(9*10*11)简便运算
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/(1+2+3)1/(1+2+3+4)+.1/(1+2+3+4+5+6+7+8+9+10)=