(1-1/2+1/3-1/4.+1/99-1/100 )÷(1/102+1/104+1/106+……+1/200)
来源:学生作业帮 编辑:作业帮 分类:数学作业 时间:2024/05/14 05:09:50
(1-1/2+1/3-1/4.+1/99-1/100 )÷(1/102+1/104+1/106+……+1/200)
(1-1/2+1/3-1/4+...+1/99-1/100)÷(1/102+1/104+..+1/200)
=(1+1/3+..+1/99-1/2-1/4-...-1/100)÷(1/102+1/104+..+1/200)
=[1+1/2+..+1/100-2(1/2+1/4+..+1/100)]÷[1/2(1/51+..+1/100)]
=[1+1/2+..+1/100-(1/1+1/2+..+1/50)]÷[1/2(1/51+..+1/100)]
=(1/51+..+1/100)÷[1/2(1/51+..+1/100)]
=2
=(1+1/3+..+1/99-1/2-1/4-...-1/100)÷(1/102+1/104+..+1/200)
=[1+1/2+..+1/100-2(1/2+1/4+..+1/100)]÷[1/2(1/51+..+1/100)]
=[1+1/2+..+1/100-(1/1+1/2+..+1/50)]÷[1/2(1/51+..+1/100)]
=(1/51+..+1/100)÷[1/2(1/51+..+1/100)]
=2
(1-1/2+1/3-1/4.+1/99-1/100 )÷(1/102+1/104+1/106+……+1/200)
(1/1+101+1/2+102+……+1/50+150)÷(1-1/2+1/3-1/4+……+1/99-1/100)
1/102+1/104+1/106+...+1/200分之1-1/2+1/3-1/4+1/5-1/6...+1/99-1
(1-1/2+1/3-1/4+1/5-1/6+.+1/99-1/100)/(1/102+1/104+1/106+.+1/
1-1/2+1/3-1/4+1/5-1/6+.+1/99-1/100○(1/102+1/104+1/106+...+1/
1+2+3+4+5+6+7+8+9+…………99+100+101+102+103+104+………200+201+…………
1-1/2+1/3-1/4+1/5-1/6+…+1/99-1/100 1/(101+1)+1/(2+102)+1/(3+
(-1+1/100)*(-1+1/101)*(-1+1/102)*……*(-1+1/1000)*……*(-1+1/200
1-1/2+1/3-1/4+1/5-1/6…+1/99-1/100)/(1/51+1/52+1/53+…+1/99+1/
200×(1-1/2)×(1-1/3)×(1-1/4)×……×(1-1/100)=?
计算(-1+1/100)×(-1+1/101)×(-1+1、102)×……×(-1+1/2008)
分数简便运算 (1/101+1/102+1/103+1/104+1/105+1/106+……+1/150)×3=?