Question

S=2/2.6+2/6.10+...+2/96.100

 

Answer 1

TUI BÍT KB RÙI K THÌ LÀM HỘ

Answer 2

Nghĩa là sao

Answer 3

Bạn ơi lm hộ mk cái

Answer 4

S=49/200

Answer 5

Làm sao bạn chỉ luôn hộ mk vs

Answer 6

\(giải:\)

\(S=\frac{2}{2.6}+\frac{2}{6.10}+...+\frac{2}{96.100}\)

\(\Rightarrow2S=2\left(\frac{2}{2.6}+\frac{2}{6.10}+...+\frac{2}{96.100}\right)\)

\(\Rightarrow2S=\frac{4}{2.6}+\frac{4}{6.10}+...+\frac{4}{96.100}\)

\(\Rightarrow2S=\frac{1}{2}-\frac{1}{6}+\frac{1}{6}-\frac{1}{10}+...+\frac{1}{96}-\frac{1}{100}\)

\(2S=\frac{1}{2}-\frac{1}{100}\)

\(\Rightarrow S=\left(\frac{1}{2}-\frac{1}{100}\right):2\)

\(\Rightarrow S=\frac{49}{100}:2=\frac{49}{200}\)

VẬY S=49/100

Answer 7

Thank you

Answer 8

\(=\frac{2}{4}\times\left(\frac{1}{2}-\frac{1}{6}+\frac{1}{6}-\frac{1}{10}+...+\frac{1}{96}-\frac{1}{100}\right)\)

\(=\frac{1}{2}\times\left(\frac{1}{2}-\frac{1}{100}\right)\)

\(=\frac{1}{2}\times\frac{49}{100}=\frac{49}{200}\)