Với a ≥ 0, b ≥ 0, chứng tỏ √(a2 b) = a√b
√(a2 b) = √(a2 ).√b = |a| √b = a√b (do a ≥ 0;b ≥ 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.