Question

\(B=\frac{5}{11.16}+\frac{5}{16.21}+...+\frac{5}{61.66}\)

Answer 1

\(\frac{5}{66}\)    nha

Answer 2

\(B=\frac{5}{11.13}+\frac{5}{16.21}+...+\frac{5}{61.66}\)

\(\Rightarrow B=\frac{1}{11}-\frac{1}{16}+\frac{1}{16}-\frac{1}{21}+...+\frac{1}{61}-\frac{1}{66}\)

\(\Rightarrow B=\frac{1}{11}-\frac{1}{66}\)

\(\Rightarrow B=\frac{5}{66}\)

Answer 3

\(\frac{5}{66}\)\(nha\)\(b\text{ạn}\)

\(theo\)\(mk\)\(l\text{à}\)\(th\text{ế}\)

\(ch\text{úc}\)\(b\text{ạn}\)\(h\text{ọc}\)\(t\text{ốt}\)

^_^ !

Answer 4

\(\frac{5}{66}\)nha bạn

theo mk như vậy

chúc bạn học tốt

^_^ !