1 .Cho hàm số y=f(x)=ax².Biết rằng khi x=5 thì y=\(\frac{75}{2}\).Tìm giá trị nhỏ nhất và giá trị lớn nhất của y khi x thõa mãn điều kiện -4 \(\le\) x \(\le\) 2

2. Cho hàm số y=f(x)=-2x² ..Chứng minh rằng với mọi giá trị của x thõa
mãn điều kiện -3 \(\le\) x \(\le\) -1 ta điều có f(-3) \(\le\) -2x² \(\le\) f(-1).Suy ra rằng x
biến đổi thõa mãn điều kiện -3 \(\le\) x \(\le\) -1 thì y có giá trị bé nhất là -18 và giá
trị lớn nhất là -2

Tìm x,y,z thỏa mãn đẳng thức sau :

(x-z)² + (y-z)² +y² +z² = 2xy -2yz + 6z - 9

1. Linda doesn't feel ..... (good) today

2. Sandra did ... ( bad ) of all in the test

3. Their car is .... (cool) inthe neighbourhood

4. He came to the party .... (late) of all

5. John's ...... (old) brother is a pilot

6. Poor thing! That's .....(sad) thing I've ever heard!

7. I can for sure that it;s ...... (interesting) movie I've ever seen

8. Tina is considered to be ......(shy) person in class

9. Dan feels much .. (good) today

10. That skirt is too smallfor my daughter to wear

That skirt is so ..............

11. It's warm enough for children to walk outside

It's so warm ....

12. Can you tell me the way to the nearest station ?

Can you tell me how ..?

13.

1.My mother ......... speak English when she was young, but she can't now (can, could, should, has to)

2.She....go to the zoo or the park. She isn't sure (may, has to, would, should)

3. ..............in class, please. (Don't talk, Not to talk. Not talking, Not talk)

4. .........in please, we have just come. (Come, To come, Coming, Came)

5. Do you have ...... (some, any, many, a lot) money? Can I borrow ..... (any, some, much, many) ?

6. We always go .......... (on, in, at, of) holiday ....... (on, at, in, of) summer

7. My son doesn't like asking his mum .. pocket money (to, at, for, of)

8. We .... officials of hanoi people's committee (are being, are, is being, is)

9. We .. the museum this afternoon. Will you go with us? We have enough tickets for us (visit, are going to visit, will visit, have visited)

10. The Government .............. a new bridge across this river next year (build, shall build, is going to build, have built)

11. ..............Paul? ( Are you going to marry, Shall you marry, Do you marry, Are you marrying)

\(\sqrt{9-4\sqrt{2}}-\sqrt{11+6\sqrt{2}}\)

Trong học tập, muốn tốt ta phải làm gì ?

đây là bài kiểm tra 1 tiết môn sinh học lớp 8 nên các bạn nhớ giải thichstheo cách sinh học nha

thanks

diện tích hình vuông là:
12x12=144 (cm²)

đáp số :144 (cm²

ôxi hóa

L = 50

nha bạn

Kết quả = xấu