Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
a/\(\frac{13}{35}=\frac{5}{35}+\frac{7}{35}+\frac{1}{35}=\)\(\frac{1}{7}+\frac{1}{5}+\frac{1}{35}\)
b/\(\frac{5}{12}=\frac{4}{12}+\frac{1}{12}=\frac{1}{3}+\frac{1}{12}\)
A, (-1/5)+ (-1/6) + (-1/3)= [(-6)+(-5)+(-10)]/30= -21/30
B, (-1/2)+(-1/5)= [(-5)+(-2)]/10= -7/10
xin T.I.C.H
\(\frac{15}{16}\)= \(\frac{1}{16}\)+ \(\frac{1}{8}\)+ \(\frac{1}{4}\)+ \(\frac{1}{2}\)
P/s tham khảo nha
\(\frac{15}{16}+\frac{1}{16}+\frac{1}{8}+\frac{1}{2}+\frac{1}{4}\)
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) \(\frac{{17}}{{18}} = \frac{9}{{18}} + \frac{6}{{18}} + \frac{2}{{18}} = \frac{1}{2} + \frac{1}{3} + \frac{1}{9}\).
\(\frac{11}{16}=\frac{1+2+8}{16}=\frac{1}{16}+\frac{2}{16}+\frac{8}{16}=\frac{1}{16}+\frac{1}{8}+\frac{1}{2}\)
Cho
A = \(\frac{1}{5}+\frac{1}{13}+\frac{1}{25}+.....+\frac{1}{n^2+\left(n+1\right)^2}\)Chứng minh rằng A <\(\frac{9}{20}\)
a: 13/35=1/5+1/7+1/35
b: 17/63=1/7+1/9+1/63