1:We should eat a lot of fruit and vegetable every day.

2:Because it rained heavily,we couldn't keep on cleaning the streets.

3:Unless the weather improved,the garden party won't take place.

4:The library lend both students and teachers books.

5:He plays this pieces of music most beautifully.

Do \(\left(\frac{4}{9}x-\frac{2}{15}\right)^6\ge0\)

=>\(-\left(\frac{4}{9}x-\frac{2}{15}\right)^6\le0\)

=>\(B=-\left(\frac{4}{9}x-\frac{2}{15}\right)^6+3\le3\)

=>GTLN của B=3 <=>\(\left(\frac{4}{9}x-\frac{2}{15}\right)^6=0\Leftrightarrow\frac{4}{9}x-\frac{2}{15}=0\Leftrightarrow\frac{4}{9}x=\frac{2}{15}\Leftrightarrow x=\frac{2}{15}:\frac{4}{9}=\frac{2}{15}\cdot\frac{9}{4}=\frac{3}{10}\)

turning.........Mk chúc bạn học tốt và một năm mới an lành nhé!

FROM nha bạn!~.~

1:want

2:has

3: is looking

1:What is your sister doing?

2:Where is he reading?

3:Where is the train going to?

4:What is her sister doing?

5:Where does your mother work?

6:What are Nam and Ba going to do?

\7:Where is Bill going to take thier chairs ?

8:What color are his pencils?

9:When does Mr.Tam always work?

10:Where are they going to have dinner?

11:How many texts are they going to read?

Chúc bạn học tốt và một năm mới na lành!