(2-$\frac{3}{2}$). (2-$\frac{4}{3}$).(2-$\frac{5}{4}$).(2-$\frac{6}{5}$) 29/09/2021 Bởi Daisy (2-$\frac{3}{2}$). (2-$\frac{4}{3}$).(2-$\frac{5}{4}$).(2-$\frac{6}{5}$)
Đáp án: 1/5
= 2( -3/2-4/3-5/4-6/5)
= 2( -317/60)
= -317/30