1÷(1/20+1/21+1/22+1/23+1/24+1/25+1/26+1/27+1/28+1/29)的整数部分是多少?急
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1÷(1/20+1/21+1/22+1/23+1/24+1/25+1/26+1/27+1/28+1/29)的整数部分是多少?急
1÷(1/20+1/21+1/22+1/23+1/24+1/25+1/26+1/27+1/28+1/29)的整数部分是多少?急
1÷(1/20+1/21+1/22+1/23+1/24+1/25+1/26+1/27+1/28+1/29)的整数部分是多少?急
1/20=0.05,1/29≈0.03.
都按0.05算,1/0.5=2,这个值应该小于实际值
都按0.03算,1/0.3=3,这个值应该大于实际值
所以整数部分为2
1÷(1/20+1/21+1/22+1/23+1/24+1/25+1/26+1/27+1/28+1/29)的整数部分是多少?急
(1-1/19)(1-1/20)(1-1/21)(1-1/22)...(1-1/99)=
(19/1-1)(20/1-1)(21/1-1)(22/1)...(99/1-1)
(19/1-1)(20/1-1)(21/1-1)(22/1)...(99/1-1)
1÷(1×2×3)+1÷(2×3×4)+1÷(3×4×5)+``````1÷(20×21×22)=
计算:|1/21-1/20|+|1/22-1/21|+|1/23-1/22|...|1/30-1/29|
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|+...+|1/2004-1/2003|| |是绝对值
(1/21-1/20)+(1/22-1/21)+(1/23-1/22)+…+(1/2004-1/2003)=
(1/21-1/20)+(1/22-1/21)+(1/23-1/22)+…+(1/2004-1/2003)=
22又20/1乘21/2
简算:22又20分之1乘以21分之1
22又20/1*21/1(简算)
22又20分之1*21分之122 20/1*21/1
1/(1/20+1/21+1/22+……+1/39)的整数部分
1/1*2*3 + 1/2*3*4 + 1/3*4*5 +.+1/20*21*22
20除以20又20/21+1/22=?快.
(1-1÷19)×(1-1÷20)×(1-1÷21).×(1-1÷99)怎么计算