Tính: $\frac{1.3.5.7…49}{26.27.28.29…50}$ 02/10/2021 Bởi Liliana Tính: $\frac{1.3.5.7…49}{26.27.28.29…50}$
$\frac{1.3.5.7…49}{26.27.28.29…50}$ = $\frac{1.3.5.7…49}{26.27.28.29…50}$ . $\frac{2.4.6.8…50}{2.4.6.8…50}$ = $\frac{1.2.3.4…50}{26.27.28.29…50.(2.1)(2.2).(2.3)…(2.24)(2.25)}$ = $\frac{1.2.3.4…50}{1.2.3.4…50.2^{25} }$ = $\frac{1}{2^{25} }$ Bình luận
$\frac{1.3.5.7…49}{26.27.28.29…50}$
= $\frac{1.3.5.7…49}{26.27.28.29…50}$ . $\frac{2.4.6.8…50}{2.4.6.8…50}$
= $\frac{1.2.3.4…50}{26.27.28.29…50.(2.1)(2.2).(2.3)…(2.24)(2.25)}$
= $\frac{1.2.3.4…50}{1.2.3.4…50.2^{25} }$
= $\frac{1}{2^{25} }$