Question

Chứng minh rằng:

a) \(\frac{{2024}}{{1000}} > 1,9;\)

b) \( - \frac{{2022}}{{2023}} >  - 1,1.\)

Answer 1

a) \(\frac{{2024}}{{1000}} > 1,9;\)

Ta có \(\frac{{2024}}{{1000}} > \frac{{2000}}{{1000}}\) hay \(\frac{{2024}}{{1000}} > 2 > 1,9\) nên  \(\frac{{2024}}{{1000}} > 1,9\)

b) \(\frac{{ - 2022}}{{2023}} >  - 1,1.\)

Ta có \(\frac{{ - 2022}}{{2023}} > \frac{{ - 2023}}{{2023}}\) hay \(\frac{{ - 2022}}{{2023}} >  - 1 >  - 1,1\) nên \(\frac{{ - 2022}}{{2023}} >  - 1,1.\)