Ta đặt \(\frac{a}{2}=\frac{b}{3}=k\)
\(\Rightarrow a=2k;b=3k\)
\(\Rightarrow ab=6k^2\)
\(\Rightarrow k^2=54:6=9\)
\(\Rightarrow k=3\)
\(\Rightarrow a=3.2=6\)
\(b=3.3=9\)
Vậy GTNN (a+b) = 6+9 = 15
Đặt: \(\frac{a}{2}=\frac{b}{3}=k\)
\(\Rightarrow a=2k;b=3k\)
\(\Rightarrow ab=6k^2\)
\(\Rightarrow k^2=54:6=9\)
\(\Rightarrow k=3\)
\(\Rightarrow a=3.2=6\)
\(b=3.3=9\)
Vậy GTNN(a + b) = 9 + 6 = 15