tính tổng\(A=\left(1+\frac{7}{9}\right).\left(1+\frac{7}{20}\right).\left(1+\frac{7}{33}\right)....\left(1+\frac{7}{2900}\right)\)

Tính

\(A=\left(1+\frac{7}{9}\right)\left(1+\frac{7}{20}\right)\left(1+\frac{7}{33}\right)....\left(1+\frac{7}{2900}\right)\)

Chứng minh rằng:​

\(\left(1+\frac{7}{9}\right).\left(1+\frac{7}{20}\right).\left(1+\frac{7}{33}\right)....\left(1+\frac{7}{2900}\right)=7\frac{1}{29}\)

tính \(B=\left(1+\frac{7}{9}\right)\left(1+\frac{7}{20}\right)\left(1+\frac{7}{33}\right)...\left(1+\frac{7}{2900}\right)\)

Nhanh giùm mình nha, gấp lắm rùi

CMR : \(\left(1+\frac{7}{7}\right)+\left(1+\frac{7}{20}\right)+\left(1+\frac{7}{33}\right)+...+\left(1+\frac{7}{2900}\right)=7\frac{1}{29}\)

1/ Tìm giá trị nhỏ nhất của biểu thức:  A= |x-20| + |y+5| - 2015

2/ Tính: \(B=\left(1+\frac{7}{9}\right)\left(1+\frac{7}{20}\right)\left(1+\frac{7}{33}\right)....\left(1+\frac{7}{2900}\right)\)

\(H=\left(1+\frac{7}{9}\right)x\left(1+\frac{7}{20}\right)x\left(1+\frac{7}{33}\right)x....x\left(1+\frac{7}{2900}\right)\)

Tìm H giúp mình với mấy bạn, nhớ là làm theo cách làm của cấp 1 nhé!

R.G :\(A=\frac{3}{5}+\frac{3}{7}+\frac{3}{13}-\frac{3}{295}\)

       \(B=\left(1+\frac{1}{1.3}\right)\left(1+\frac{1}{2.4}\right)\left(1+\frac{1}{3.6}\right)...\left(1+\frac{1}{99.101}\right)\)

       \(C=\left(1+\frac{7}{9}\right)\left(1+\frac{7}{20}\right)\left(1+\frac{7}{33}\right)\left(1+\frac{7}{28}\right)...\left(1+\frac{7}{2900}\right)\)

Tính : A = \(\left(1+\frac{7}{9}\right)\)\(\left(1+\frac{7}{20}\right)\)\(\left(1+\frac{7}{33}\right)\).............\(\left(1+\frac{7}{2900}\right)\)