tính nhanh: (1- 3/4)x(1-3/7)x(1-3/10)x(1-3/13)x…x(1-3/97)x(1-3/100) 15/08/2021 Bởi Faith tính nhanh: (1- 3/4)x(1-3/7)x(1-3/10)x(1-3/13)x…x(1-3/97)x(1-3/100)
(1-$\frac{3}{4}$).(1-$\frac{3}{7}$).(1-$\frac{3}{10}$).(1-$\frac{3}{13}$). … .(1- $\frac{3}{97}$).(1- $\frac{3}{100}$) = $\frac{1}{4}$ . $\frac{4}{7}$ . $\frac{7}{10}$ . $\frac{10}{13}$ . … . $\frac{94}{97}$ . $\frac{97}{100}$ = $\frac{1 . 4 . 7 . 10 . … . 94 . 97}{4 . 7 . 10 . 13 . 97 . 100}$ = $\frac{1}{100}$ Chúc học tốt!!! Bình luận
$\bigg(1-\dfrac{3}{4}\bigg).\bigg(1-\dfrac{3}{7}\bigg)\bigg(1-\dfrac{3}{10}\bigg)…….\bigg(1-\dfrac{3}{97}\bigg).\bigg(1-\dfrac{3}{100}\bigg)$ $ = \dfrac{1}{4}.\dfrac{4}{7}.\dfrac{7}{10}…..\dfrac{94}{97}.\dfrac{97}{100}$ $ = \dfrac{1}{100}$ Bình luận
(1-$\frac{3}{4}$).(1-$\frac{3}{7}$).(1-$\frac{3}{10}$).(1-$\frac{3}{13}$). … .(1- $\frac{3}{97}$).(1- $\frac{3}{100}$)
= $\frac{1}{4}$ . $\frac{4}{7}$ . $\frac{7}{10}$ . $\frac{10}{13}$ . … . $\frac{94}{97}$ . $\frac{97}{100}$
= $\frac{1 . 4 . 7 . 10 . … . 94 . 97}{4 . 7 . 10 . 13 . 97 . 100}$
= $\frac{1}{100}$
Chúc học tốt!!!
$\bigg(1-\dfrac{3}{4}\bigg).\bigg(1-\dfrac{3}{7}\bigg)\bigg(1-\dfrac{3}{10}\bigg)…….\bigg(1-\dfrac{3}{97}\bigg).\bigg(1-\dfrac{3}{100}\bigg)$
$ = \dfrac{1}{4}.\dfrac{4}{7}.\dfrac{7}{10}…..\dfrac{94}{97}.\dfrac{97}{100}$
$ = \dfrac{1}{100}$