\(a.\left[bn\right]=b.\left[an\right]\)
\(\Rightarrow\frac{a}{b}=\frac{an}{bn}\)
\(\Rightarrow\frac{a}{b}=\frac{a}{b}\)
\(\Rightarrow\left(a,b\right)\in R\)
\(a.\left[bn\right]=\left[b.an\right]\)
\(\Rightarrow\frac{a}{b}=\frac{an}{bn}\)
\(\Rightarrow\frac{a}{b}=\frac{a}{b}\)
\(\Rightarrow\left(a;b\right)\in R\)
chúc các bn hoc tốt
A.(BN) = (B.AN)
=>\(\frac{A}{B}=\frac{AN}{BN}\)
=>\(\frac{A}{B}=\frac{A}{B}\)
=>(A;B) \(\in R\)
\(a.\left(BN\right)=\left(B.an\right)\)
\(\Rightarrow\frac{a}{b}=\frac{an}{bn}\)
\(\Rightarrow\frac{a}{b}=\frac{a}{b}\)
\(\Rightarrow\left(a;b\right)\in R\)
Ta có : \(a.\left[bn\right]=b.\left[a.n\right]\)
\(\Rightarrow\frac{a}{b}=\frac{an}{bn}\)
\(\Rightarrow\frac{a}{b}=\frac{a}{b}\)\(\Leftrightarrow\frac{a}{a}=\frac{b}{b}=\frac{a+b}{a+b}=1\)
\(\Rightarrow\hept{\begin{cases}\frac{a}{b}=1\\\frac{a}{b}=1\end{cases}}\Rightarrow\hept{\begin{cases}a=b\\b=a\end{cases}}\)
\(\Rightarrow\left(a,b\right)\in R\) ( Trong đó tất cả các số (a) đều bằng các số (b) )