\(A=\dfrac{3}{4}.\dfrac{8}{9}.\dfrac{15}{16}.....\dfrac{9999}{10000}\)

\(A=\dfrac{1.3}{2.2}.\dfrac{2.4}{3.3}.\dfrac{3.5}{4.4}.....\dfrac{99.101}{100.100}\)

\(A=\dfrac{1.2.3...99}{2.3.4...100}.\dfrac{3.4.5...101}{2.3.4...100}\)

\(A=\dfrac{1}{100}.\dfrac{2}{101}\)

\(A=\dfrac{1}{5050}\)

Câu b,c tương tự nhé.Thực hiện phép tính trong ngoặc rồi tính ra.

chúc bạn học tốt.

\(\dfrac{23}{7}.x-\dfrac{1}{8}=\dfrac{11}{4}\)

\(\dfrac{23}{7}.x=\dfrac{11}{4}+\dfrac{1}{8}\)

\(\dfrac{23}{7}.x=\dfrac{23}{8}\)

\(x=\dfrac{23}{8}:\dfrac{23}{7}\)

\(x=\dfrac{7}{8}\)

A. skills

B. performances

C. changes

D. things