Question

1/2 + 1/4 + 1/8 + .......... + 1/16 +1/32 + 1/64

Answer 1

1/2+1/4+1/8+1/16+1/32+1/64=63/64 

nhớ k mik nha

Answer 2

Nghi lời giải ra cho mình với.

Answer 3

Gọi A= 1/2 + 1/4 + 1/8 + .......+ 1/16 +1/32 + 1/64

\(A=\frac{1}{2}+\frac{1}{2^2}+\frac{1}{2^3}+\frac{1}{2^4}+\frac{1}{2^5}\frac{1}{2^6}\)

\(2A=1+\frac{1}{2}+\frac{1}{2^2}+....+\frac{1}{2^5}\)

\(2A-A=A=1-\frac{1}{2^5}=1-\frac{1}{64}=\frac{63}{64}\)