Bài 1.
\(A=\left(\frac{6}{8}+1\right)\left(\frac{6}{18}+1\right)\left(\frac{6}{30}+1\right)...\left(\frac{6}{10700}+1\right)\)
\(A=\frac{14}{8}\times\frac{24}{18}\times\frac{36}{30}\times...\times\frac{10706}{10700}\)
\(A=\frac{2\times7}{1\times8}\times\frac{3\times8}{2\times9}\times\frac{4\times9}{3\times10}\times...\times\frac{101\times106}{100\times107}\)
\(A=\frac{2\times7\times3\times8\times...\times101\times106}{1\times8\times2\times9\times...\times100\times107}\)
\(A=\frac{\left(2\times3\times4\times...\times101\right)\times\left(7\times8\times9\times...\times106\right)}{\left(1\times2\times3\times...\times100\right)\times\left(8\times9\times10\times...\times107\right)}\)
\(A=\frac{101\times7}{107}\)
\(A=\frac{707}{107}\)
Bài 2.
Thiếu đề bài
P/S : bài 1 làm chưa chắc đúng đâu nha.
