A = 1+2^2+2^3+..+2^2010 Mới vô lớp 6 đang học trước nâng cao mong bày hộ 01/08/2021 Bởi Mary A = 1+2^2+2^3+..+2^2010 Mới vô lớp 6 đang học trước nâng cao mong bày hộ
${A}$ = ${1}$+$2^{2}$+$2^{3}$+…+$2^{2010}$ ${2A}$ = ${2}$ . ( ${1}$+$2^{2}$+$2^{3}$+…+$2^{2010}$ ) ${2A}$ = ${2}$+$2^{3}$+$2^{4}$+…+$2^{2011}$ ${2A}$ – ${A}$ = ( ${2}$+$2^{3}$+$2^{4}$+…+$2^{2011}$ ) – ( ${1}$+$2^{2}$+$2^{3}$+…+$2^{2010}$ ) ${A}$ = ${2}$+$2^{3}$+$2^{4}$+…+$2^{2011}$ – ${1}$-$2^{2}$-$2^{3}$-…-$2^{2010}$ ${A}$ = $2^{2011}$-${1}$ $\text{STUDY WELL!}$ Bình luận
`A = 1+2^2+2^3+..+2^2010` `2A= 2+2^3+2^4+…+2^2011` `2A-A=(2+2^3+2^4+…+2^2011)-(1+2^2+2^3+..+2^2010)` `A = 2^2011 – 1` Xin hay nhất ???? Bình luận
${A}$ = ${1}$+$2^{2}$+$2^{3}$+…+$2^{2010}$
${2A}$ = ${2}$ . ( ${1}$+$2^{2}$+$2^{3}$+…+$2^{2010}$ )
${2A}$ = ${2}$+$2^{3}$+$2^{4}$+…+$2^{2011}$
${2A}$ – ${A}$ = ( ${2}$+$2^{3}$+$2^{4}$+…+$2^{2011}$ ) – ( ${1}$+$2^{2}$+$2^{3}$+…+$2^{2010}$ )
${A}$ = ${2}$+$2^{3}$+$2^{4}$+…+$2^{2011}$ – ${1}$-$2^{2}$-$2^{3}$-…-$2^{2010}$
${A}$ = $2^{2011}$-${1}$
$\text{STUDY WELL!}$
`A = 1+2^2+2^3+..+2^2010`
`2A= 2+2^3+2^4+…+2^2011`
`2A-A=(2+2^3+2^4+…+2^2011)-(1+2^2+2^3+..+2^2010)`
`A = 2^2011 – 1`
Xin hay nhất ????