Bài 5: (0,75điểm)  Thực hiện phép tính \(\left(1+\dfrac{1}{1.3}\right)\left(1+\dfrac{1}{2.4}\right)\left(1+\dfrac{1}{3.5}\right)...\left(1+\dfrac{1}{2019.2021}\right)\)

Bài 5: (0,75điểm)  Thực hiện phép tính \(\dfrac{2}{1.4}+\dfrac{2}{4.7}+...+\dfrac{2}{97.100}\)

3. and/ They/ eat meals/ cook/ small kitchen./ and/ their/ in.
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2. That/ is/ the/ film/ boring/ I/ seen/ most/ ever/ have.
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