cmr: `1-1/2^2-1/3^2-1/4^2-….-1/2006^2>1/2006`

0 bình luận về “cmr: `1-1/2^2-1/3^2-1/4^2-….-1/2006^2>1/2006`”

1. `1-1/{2^2} – 1/{3^2} – 1/{4^2} – … – 1/{2006^2} > 1/2006`

   `1-1/{2^2} – 1/{3^2} – 1/{4^2} – … – 1/{2006^2}`

   `1-1/{2^2} – 1/{3^2} – 1/{4^2} – … – 1/{2006^2} > ` `(1/{1xx2} + 1/{2xx3} + 1/{3xx4} + … + 1/{2005xx2006}`

   `1-1/{2^2} – 1/{3^2} – 1/{4^2} – … – 1/{2006^2} > ` `(1-1/2+1/2-1/3+1/3-1/4 + …+1/2005-1/2006`

   `1-1/{2^2} – 1/{3^2} – 1/{4^2} – … – 1/{2006^2} > ` `(1-0-2006)`

   `1-1/{2^2} – 1/{3^2} – 1/{4^2} – … – 1/{2006^2} > ` `(1-2006)`

   `1-1/{2^2} – 1/{3^2} – 1/{4^2} – … – 1/{2006^2} > ` `1/2006` `(Đpcm)`

   Bình luận

2. `A=1-1/2^2-1/3^2-1/4^2-………-1/2006^2`

   `A=1-(1/2^2+1/3^2+1/4^2+………….+1/2006^2)`

   `A>1-(1/(1.2)+1/(2.3)+1/(3.4)+…………..+1/(2005.2006))`

   `A>1-(1-1/2+1/2-1/3+1/3-1/4+…………+1/2005-1/2006)`

   `A>1-(1-1/2006)`

   `A>1/2006` `(Đpcm)`

    

   Bình luận