1/22+1/23+1/24+1/25+1/26+1/27+1/28+1/29+1/30=?
来源:学生作业帮 编辑:神马作文网作业帮 分类:数学作业 时间:2024/10/01 17:40:35
1/22+1/23+1/24+1/25+1/26+1/27+1/28+1/29+1/30=?
原式=1/(22*23)+1/(24*25)+1/(26*27)+1/(28*29)+1/30
=(22+23)/(22*23)+(24+25)/(24*25)+(26+27)/(26*27)+(28+29)/(28*29)+1/30
=(45*24*25+49*22*23)/(22*23*24*25)+(26+27)(28*29)+(28+29)(26*27)/(26*27*28*29)
=51794/303600+83050/570024+1/30
数字太大无法用分式表示约等于=0.349628426
=(22+23)/(22*23)+(24+25)/(24*25)+(26+27)/(26*27)+(28+29)/(28*29)+1/30
=(45*24*25+49*22*23)/(22*23*24*25)+(26+27)(28*29)+(28+29)(26*27)/(26*27*28*29)
=51794/303600+83050/570024+1/30
数字太大无法用分式表示约等于=0.349628426
1/22+1/23+1/24+1/25+1/26+1/27+1/28+1/29+1/30=?
提问:根据21+21=22,22+22=23……计算1+2+22+23+24+25+26+27+28++29=?
根据21+21=22,22+22=23计算1+2+22+23+24+25+26+27+28+29=?
20分之1+21分之1+22分之1+23分之1+24分之1+25分之1+26分之1+27分之1+28分之1+29分之1
1/20+2/21+2/22+2/23+2/24+2/25+2/26+2/27+2/28+2/29+1/30如何算
|1/21-1/20|+|1/22-1/21|+|1/23-1/22|+...|1/30-1/29| 急
关于绝对值|1/21-1/20|+|1/22-1/21|+|1/23-1/22|+...|1/30-1/29|
|1/21-1/20|+|1/22-1/21|+|1/23-1/22|+…+|1/30-1/29|
计算:|1/21-1/20|+|1/22-1/21|+|1/23-1/22|...|1/30-1/29|
26*28*(1/26*27+1/27*28)简便计算
26*28*{1/(26*27)+1/(27*28)}简便算法
30^2-29^2+28^2-27^2+26^2...+2^2-1^2=