Question

Tính

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

Bạn nào làm đầy đủ , dễ hiểu k cho

Answer 1

 1/2+1/4+1/8+1/16+1/32+1/64

=2x(1/2+1/4+1/8+1/16+1/321/64)

=1+1/2+1/4+1/8+1/16+1/32

=1+1/2+1/4+1/8+1/16+1/32-1/2-1/4-1/8-1/16-1/32-1/64

=1-1/64

=63/64

Answer 2

\(\frac{1}{2}+\frac{1}{4}+\frac{1}{8}+\frac{1}{16}+\frac{1}{32}+\frac{1}{64}\)

\(=\frac{32}{64}+\frac{16}{64}+\frac{8}{64}+\frac{4}{64}+\frac{1}{64}+\frac{1}{64}\)

\(=\frac{62}{64}=\frac{31}{32}\)

Answer 3

bạn nào k mình mình k lại

Answer 4

đặt A = \(\frac{1}{2}+\frac{1}{4}+\frac{1}{8}+\frac{1}{16}+\frac{1}{32}+\frac{1}{64}\)

A  x 2 = \(1+\frac{1}{2}+\frac{1}{4}+\frac{1}{8}+\frac{1}{16}+\frac{1}{32}\)

A x2 - A = \(1+\frac{1}{2}+\frac{1}{4}+\frac{1}{8}+\frac{1}{16}+\frac{1}{32}-\frac{1}{2}-\frac{1}{4}-\frac{1}{8}-\frac{1}{16}-\frac{1}{32}-\frac{1}{64}\)

A= \(1-\frac{1}{64}\)

A= \(\frac{63}{64}\)