7/8=1/8+1/4+1/2=2/4+2/8+2/16=...

đưa nội quy làm gì

7/8 nha bn

học tốt

1/2+1/4+2/8

Nhầm, là 1/2+1/4+1/4

Kết quả là ............

\(\frac{7}{8}=\frac{1}{2}+\frac{1}{3}+\frac{1}{24}\)

\(\frac{7}{8}\)= \(\frac{1}{8}\)+ \(\frac{2}{8}\)+ \(\frac{4}{8}\)

\(\frac{7}{8}\)= \(\frac{2}{8}\)+ \(\frac{2}{8}\)+ \(\frac{3}{8}\)

\(\frac{7}{8}=\frac{1}{2}+\frac{1}{4}+\frac{1}{8}\)

\(a,\)                \(\frac{7}{8}=\frac{1+2+4}{8}=\frac{1}{8}+\frac{2}{8}+\frac{4}{8}=\frac{4}{32}+\frac{4}{16}+\frac{4}{8}\)

\(\text{b,}\)                  \(\left(1-\frac{1}{2}\right).\left(1-\frac{1}{3}\right).\left(1-\frac{1}{4}\right).\left(1-\frac{1}{5}\right)\)

                    \(=\frac{1}{2}.\frac{2}{3}.\frac{3}{4}.\frac{4}{5}\)

                    \(=\frac{1}{5}\)

B)(1-1/2).(1-1/3).(1-1/4).(1-1/5)

= (2/2-1/2).(3/3-1/3).(4/4-1/4).(5/5-1/4)

=1/2.2/3.3/4.4/5

=1.2.3.4/2.3.4.5=1.2.3.4/2.3.4.5=1/5

1/8,2/8,4/8 bn nhé

1/8 ; 2/8 ;4/8

7/8 = 1/8 + 1/8 + 1/8 + 1/8 + 1/8 + 1/8 + 1/8

7/8=1/8+1/8+1/8+1/8+1/8+1/8+1/8

Ta có:  \(\frac{7}{8}=\frac{1}{8}+\frac{2}{8}+\frac{4}{8}\)

\(\Rightarrow\frac{7}{8}=\frac{1}{8}+\frac{1}{4}+\frac{1}{2}\)

a) \(\frac{2}{3} = \frac{4}{6} = \frac{1}{6} + \frac{3}{6} = \frac{1}{6} + \frac{1}{2}\)

b) \(\frac{8}{{15}} = \frac{5}{{15}} + \frac{3}{{15}} = \frac{1}{5} + \frac{1}{3}\)

c) \(\frac{7}{8} = \frac{4}{8} + \frac{2}{8} + \frac{1}{8} = \frac{1}{2} + \frac{1}{4} + \frac{1}{8}\)

d) \(\frac{{17}}{{18}} = \frac{9}{{18}} + \frac{6}{{18}} + \frac{2}{{18}} = \frac{1}{2} + \frac{1}{3} + \frac{1}{9}\).