Question

[My Love]

Rút gọn : B=(1-\(\frac{1}{2}\)) x ( 1-\(\frac{1}{3}\)) x ( 1-\(\frac{1}{4}\)) x ..... x (1 - \(\frac{1}{20}\))

m.n giúp mk nha mk cần gấp

Answer 1

[ღ๖ۣۜLinh's ๖ۣۜLinh'sღ] ★we are one★]

\(B=\frac{1}{2}.\frac{2}{3}.\frac{3}{4}....\frac{19}{20}=\frac{1}{20}\)

Answer 2

[KAl(SO4)2·12H2O]

\(B=\left(1-\frac{1}{2}\right)\left(1-\frac{1}{3}\right)\left(1-\frac{1}{4}\right)...\left(1-\frac{1}{20}\right)\)

\(B=\frac{1}{2}.\frac{2}{3}.\frac{3}{4}...\frac{19}{20}\)

\(B=\frac{1}{20}\)