Các câu hỏi tương tự
Giúp mình với, mai mình phải nộp bài rùiiiii plzzz
3/3.5 + 3/5.7 + 3/7.9 +...+ 1/x.(x+2)
Tìm x nha :)
1/3.5 +1/5.7+1/7.9+...+1/(2.x+1).(2.x+3)
Tìm x
Tìm x, biết: 1/3 + 1/3.5 + 1/5.7 + 1/7.9 +...+ 1/(x+2).(x+4)=50/101
1/3.5+1/5.7+1/7.9+...+1/(2.x+1)(2.x+3)=5/31
bài 1
a,-1/8 - (320% + 9/5 ) . (1/4 - 1/8
b,4/3.5 + 4/5.7 + 4/7.9 + ......+4/99.100
bài 2
a,x+ 3/22 = 27/121.11/9
tìm B biết B=2^2/3.3^3/8^2.4^4/15^3.5^5/24^4.6^6/35^5.7^7/48^6.8^8/63^7.9^9/80^8
( 1/1.3+1/3.5+1/5.7+1/7.9+1/9.11). X = 2/3
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
Tìm x biết
2.x+2/3.5+2/5.7+2/7.9+2/9.11= -2016/2017