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\(A=-1-\frac{1}{2}-\frac{1}{4}-\frac{1}{8}-...-\frac{1}{1024}\)
\(A=-\left(1+\frac{1}{2}+\frac{1}{4}+\frac{1}{8}+...+\frac{1}{1024}\right)\)
\(-A=1+\frac{1}{2}+\frac{1}{4}+\frac{1}{8}+...+\frac{1}{1024}\)
\(-2A=2+1+\frac{1}{2}+\frac{1}{4}+...+\frac{1}{512}\)
\(-2A+A=\left(2+1+\frac{1}{2}+\frac{1}{4}+...+\frac{1}{512}\right)-\left(1+\frac{1}{2}+\frac{1}{4}+\frac{1}{8}+...+\frac{1}{1024}\right)\)
\(-A=2-\frac{1}{1024}\)
\(A=\frac{1}{1024}-2\)
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1000+ 2000= 3000
Mik đầu tiên
Mik chọn quà 1, bạn k cho mik nha
1000 + 2000 = 3000
Quà 1 : Bạn tích nha
1000 + 2000 = 3000
quà 3
1000+2000= 3000 nhé bạn mk chọn bạn tích cho mk a~
hoặc bạn cho mk quà 2 hay 3 đều được hết á nhưng mk thích quà 1 hơn
Kin_Soái chưa tíc cho mik đâu nha
1000 + 2000 = 3000
Mk lấy quà 1 vì quà 2 mik có r
1000 + 2000 = 3000
Chúc bạn học giỏi
Ko cần quà mik chỉ cần k
1000+2000
=3000
chúc bạn học tốt