Tinh :

A=\(\left(1+\frac{1}{1.3}\right)\left(1+\frac{1}{2.4}\right)\left(1+\frac{1}{3.5}\right)....\left(1+\frac{1}{2014.1016}\right)\)

Giup minh trinh bay ca cach lam nua nha!

Ai chua doc het de va ko hieu thi vao phan "Doc them" se ro

Thanks

Tinh :

A=\(\left(1+\frac{1}{1.3}\right)\left(1+\frac{1}{2.4}\right)\left(1+\frac{1}{3.5}\right)......\left(1+\frac{1}{2014.2016}\right)\)

Giup minh trinh bay ca cach lam nua nha!

Ai chua doc het de va ko hieu thi vao phan "Doc them" se ro

Thanks

cho A = 1+2+3+4+...+n va B = 2n + 1 ( voi n thuoc N , n lon hon hoac bang 2)   chung minh A va B la hai so nguyen to cung nhau

So sanh A va B biet: A=\(\frac{2010}{2011}+\frac{2011}{2012}+\frac{2012}{2010}\)                                                                                      va B=\(\frac{1}{3}+\frac{1}{4}+\frac{1}{5}+...+\frac{1}{17}\)

Trinh bay cach lam cho minh voi nhe

Ai ko hieu thi vao phan "Doc them"

Giup minh voi nhe!Please

Tinh:

\(\frac{\frac{1}{3}-\frac{1}{4}+\frac{1}{5}}{\frac{7}{6}-\frac{7}{8}+\frac{7}{10}}\)

Giup minh trinh bay cach cach giai voi nhe

Ko hieu vao phan"Doc them"

hieu cua hai so la 13/18 Neu them vao so tru 1/6 thi hieu hai so la bao nhieu ? 

va cau Bac Lan ban vai , buoi sang ban duoc 5/7 tam vai, buoi chieu ban duoc 3/5 tam vai Hoi buoi nao bac Lan ban duoc nhieu hon va nhieu hon bao nhieu phan tam vai

ai tra loi thi minh se ket ban

nhung tra loi ro rang nhe

mong cac ban tra loi cau hoi cua minh

Chung minh rang voi moi so n thi 2 so sau nguyen to cung nhau

2n+5 va 2n+7

2n+5 va 3n+8

5n+7 va 2n+3

tim mot phan so biet rang neu cong them 4 vao tu so va giu nguyen mau thi ta duoc phan so moi bang 1 con neu giu nguyen tu so va cong them 3 vao mau so thi ta duoc phan so moi bang 1/2

CÁC BẠN GIÚP MÌNH ĐI NHA '!!!!!!!!!!!!!!!!! THANK YOU "AI LAM NGAY DUOC  THI HO MINH"

Tinh:

\(B=\frac{\frac{1}{7}+\frac{1}{23}-\frac{1}{1009}}{\frac{1}{7}+\frac{1}{23}-\frac{1}{1009}+\frac{1}{7}.\frac{1}{23}.\frac{1}{1009}}\)

Trinh bay cach lam nua nhe

Co gi ko hieu thi vao phan doc them