Question

b) x:24,x:56,x:120va500<x<1000

Answer 1

x=840

Answer 2

\(24=2^3.3\\ 56=2^3.7\\ 120=2^3.3.5\\ \Rightarrow BCNN\left(24,56,120\right)=2^3.3.5.7=840\\ \Rightarrow x\in BC\left(24,56,120\right)=B\left(840\right)=\left\{0;840;1680;...\right\}\)

Mà \(500< x< 1000\Rightarrow x=840\)