Question

Tìm số b biết rằng:

           (1-1/2)*(1-1/3)*(1-1/4)*(1-1/5)=b/100

Answer 1

\(\left(1-\frac{1}{2}\right)\cdot\left(1-\frac{1}{3}\right)\cdot\left(1-\frac{1}{4}\right)\cdot\left(1-\frac{1}{5}\right)=\frac{b}{100}\)

\(\frac{1}{2}\cdot\frac{2}{3}\cdot\frac{3}{4}\cdot\frac{4}{5}=\frac{b}{100}\)

\(\frac{1}{5}=\frac{b}{100}\)

\(\Rightarrow b=100\div5\times1=20\)

Answer 2

B=0

Vì 1-1/2=0/2=>0/2=0 như thế mà tính