Rút gọn B = (1- 1/2) . ( 1- 1/3) . (1 – 1/4) … ( 1 – 1/20) 16/10/2021 Bởi Camila Rút gọn B = (1- 1/2) . ( 1- 1/3) . (1 – 1/4) … ( 1 – 1/20)
B= (1-$\frac{1}{2}$). (1-$\frac{1}{3}$). (1-$\frac{1}{4}$)…..(1-$\frac{1}{20}$) =$\frac{1}{2}$ . $\frac{2}{3}$ .$\frac{3}{4}$ …..$\frac{19}{20}$ =$\frac{1}{20}$ Bình luận
Đáp án: B = (1- 1/2) . ( 1- 1/3) . (1 – 1/4) … ( 1 – 1/20) = 1/2 . 2/3 . 3/4 . …. . 19/20 = 1.2.3. … .19/ 2.3.4. … .20 = 1/20 Bình luận
B= (1-$\frac{1}{2}$). (1-$\frac{1}{3}$). (1-$\frac{1}{4}$)…..(1-$\frac{1}{20}$)
=$\frac{1}{2}$ . $\frac{2}{3}$ .$\frac{3}{4}$ …..$\frac{19}{20}$
=$\frac{1}{20}$
Đáp án:
B = (1- 1/2) . ( 1- 1/3) . (1 – 1/4) … ( 1 – 1/20)
= 1/2 . 2/3 . 3/4 . …. . 19/20
= 1.2.3. … .19/ 2.3.4. … .20
= 1/20