Question

G=3/2.5+3/5.7+3/7.9+...+3/2015.2017

H=3/2.5+3/5.7+3/7.9+...+3/2015.2017

 

(3/3.6+3/3.9+...+3/30.33). x+2/5=7/8

(1/8+1/24+1/48+1/440). x=5/9

x:3/4+2,5=15%+16

khó wá giúp mình với huhu

Answer 1

G=\(\frac{3}{2.5}+\frac{3}{5.7}+\frac{3}{7.9}+...+\frac{3}{2015.2017}\)

G=\(3.\left(\frac{1}{2.5}+\frac{1}{5.7}+\frac{1}{7.9}+...+\frac{1}{2015.2017}\right)\)

G=\(3.\left(\frac{1}{2}.\frac{1}{5}+\frac{1}{5}.\frac{1}{7}+\frac{1}{7}.\frac{1}{9}+...+\frac{1}{2013}.\frac{1}{2015}+\frac{1}{2015}.\frac{1}{2017}\right)\)

G=\(3.\left(\frac{1}{2}+\frac{1}{2017}\right)\)

G=1.5

Anh ko bik có đúng ko nữa lâu quá rồi. Em thông cảm nhé

Answer 2

nhớ 3 câu x khác nhau nhé

Answer 3

ko sao a ạ