Chắc đề là \(y=1+\sqrt{3}sin^2\left(x-\frac{\pi}{3}\right)\)
Do \(sin^2\left(x-\frac{\pi}{3}\right)\ge0;\forall x\Rightarrow y\ge1\)
\(y_{min}=1\) khi \(sin\left(x-\frac{\pi}{3}\right)=0\)
\(\Leftrightarrow x-\frac{\pi}{3}=k\pi\Rightarrow x=\frac{\pi}{3}+k\pi\)