Ta có √x≥0
⇒√x+3≥3
⇒1√x+3≤13
⇒3√x+3≤33=1
⇒−3√x+3≥−1
Vậy −3√x+3 đạt GTNN bằng −1 tại x=0.
Choose the best answer.
I think you should buy _____ pack of mineral water instead. And you can also buy _____ snacks such as potato crisps, 3 kilos of mandarins, 2 kilos of apples, 3 bunches of bananas, ______ cookies and soft candies.
We should decorate our living room with _____ orange banner. We also need ________ ribbons, balloons, party hats and costume.
I think that ______ cauliflower is not enough for 3 people. Let’s buy one more.