A = 1/1.3 + 1/3.5 + 1/5.7 +…+ 1/2011.2013 18/10/2021 Bởi Cora A = 1/1.3 + 1/3.5 + 1/5.7 +…+ 1/2011.2013
A = 1/1.3 + 1/3.5 + 1/5.7 +…+ 1/2011.2013 A= 1/2. (2/1.3 + 2/3.5 + 2/5.7 +…+ 2/2011.2013) A= 1/2. ( 1- 1/3+1/3-1/5+1/5-1/7+…+1/2011-1/2013) A= 1/2. 2012/2013 A= 1006/2013 Bình luận
Đáp án: Giải thích các bước giải: `A = 1/1.3 + 1/3.5 + 1/5.7 +…+ 1/2011.2013` `A=1/2(2/1.3+2/3.5+2/5.7+….+2/2011.2013)` `A=1/2(1-1/3+1/3-1/5+1/5-1/7+…..+1/2011-1/2013)` `A=1/2.(2012/2013)` `A=1006/2013` Bình luận
A = 1/1.3 + 1/3.5 + 1/5.7 +…+ 1/2011.2013
A= 1/2. (2/1.3 + 2/3.5 + 2/5.7 +…+ 2/2011.2013)
A= 1/2. ( 1- 1/3+1/3-1/5+1/5-1/7+…+1/2011-1/2013)
A= 1/2. 2012/2013
A= 1006/2013
Đáp án:
Giải thích các bước giải:
`A = 1/1.3 + 1/3.5 + 1/5.7 +…+ 1/2011.2013`
`A=1/2(2/1.3+2/3.5+2/5.7+….+2/2011.2013)`
`A=1/2(1-1/3+1/3-1/5+1/5-1/7+…..+1/2011-1/2013)`
`A=1/2.(2012/2013)`
`A=1006/2013`