Question

[minh le anh]

tinh a=1/2+1/4+1/8+1/16+.....(tong co 10so hang)

a=...(viet phan so toi gian)

Answer 1

[Nguyễn Hưng Phát]

2a=\(1+\frac{1}{2}+\frac{1}{4}+\frac{1}{8}+\frac{1}{16}+\frac{1}{32}+\frac{1}{64}+\frac{1}{128}+\frac{1}{256}+\frac{1}{512}\)

2a-a=\(1-\frac{1}{1024}\)

a=\(1-\frac{1}{1024}\)

a=\(\frac{1023}{1024}\)

Answer 2

[Hậu Duệ Mặt Trời]

a= 1023/1024 

**** mik nha bn !!!