Toán D=1/2-1/2^2+1/2^3-1/2^4+…..+1/2^99-1/2^100 26/07/2021 By Aaliyah D=1/2-1/2^2+1/2^3-1/2^4+…..+1/2^99-1/2^100
`D=1/2-1/2^2+1/2^3-1/2^4+…..+1/2^99-1/2^100` `2D = 1 – 1/2+1/2^2-1/2^3+1/2^4-….-1/2^99` `2D + D = (1 – 1/2+1/2^2-1/2^3+1/2^4-….-1/2^99)+ (1/2-1/2^2+1/2^3-1/2^4+…..+1/2^99-1/2^100)` `3D = 1 – 1/2^100` `D = (1 – 1/2^100)/3` (Chúc bạn học tốt) Trả lời
Đáp án:
Giải thích các bước giải:
`D=1/2-1/2^2+1/2^3-1/2^4+…..+1/2^99-1/2^100`
`2D = 1 – 1/2+1/2^2-1/2^3+1/2^4-….-1/2^99`
`2D + D = (1 – 1/2+1/2^2-1/2^3+1/2^4-….-1/2^99)+ (1/2-1/2^2+1/2^3-1/2^4+…..+1/2^99-1/2^100)`
`3D = 1 – 1/2^100`
`D = (1 – 1/2^100)/3`
(Chúc bạn học tốt)