Hàm số `y=(k-1)x+2` đồng biến khi :
`a>0`
`⇔k-1>0`
`⇔k>1`
Vậy với `k>1` thì hàm số `y=(k-1)x+2` đồng biến
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.