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9 tháng 2

26 tháng 4 2019

Đề văn hsg thì câu nhiều điểm chắc chắn là văn nghị luận giải thích 

Đây là đề mình năm ngoái nè 

Giải thích câu nói của bác hồ :" có tài mà không có đức .... " ( lên mạng tra nhé, mình không rõ nữa )

thi tốt

AH
Akai Haruma
Giáo viên
30 tháng 11 2021

Lời giải:

$\frac{3}{5}(x-\frac{2}{3})^3=-16\frac{1}{5}=\frac{-81}{5}$

$\Leftrightarrow (x-\frac{2}{3})^3=\frac{-81}{5}: \frac{3}{5}=-27=(-3)^3$
$\Leftrightarrow x-\frac{2}{3}=-3$

$\Leftrightarrow x=\frac{-7}{3}$

10 tháng 3 2022

Thay x = 2; y = -2 vào biểu thức x(x2 - y)(x3 - 2y2)(x4 - 3y3)(x5 - 4y4) ta được :

x3 - 2y2 = 23 - 2 x (-2)2 = 8 - 8 = 0

Vậy giá trị biểu thức x(x2 - y)(x3 - 2y2)(x4 - 3y3)(x5 - 4y4) tại x = 2; y = -2 là 0

29 tháng 11 2019

1. How do you do ? – Not bad,_ _ _ _ _ you.

2. Would you prefer playing soccer or ch_ _ _?

3. How _ _ _ _ _ do you visit your grandfather? Once a week, maybe.

4. _ _ _ _ _ is this beautiful garden? I want to take pictures it– It’s my friend, David.

5. Hello, Let me _ _ _ _ _ _ _ _ _ myself, I’m Mai. I’m from Hanoi., Vietnam. Glad to meet you!

6. What does she _ _ _ _ ? She's short and slim, blonde with green eyes.

7. How _ _ _ _ are  this T-shirt and trousers? – Total is 50 dollars

8. I usually go home at half _ _ _ _ eight because I need to buy some food for my grandmother.

9. Who are you going w _ _ _? Ms. Thanh, I saw you last night.

10. How many people are _ _ _ _ _ in the world? About 7.3 billion.

Bài 2: Chọn đáp án đúng

My mom always … to the market in the morning.

a. goes b. going c. go d. to go

2. Would you some drinks after dinner? …

a. Yes, I do c. No, I don’t

b. Yes, I don’t d. No, thank you

3. … are small and cute, I want to take them to go home.

a. The cat b. My cat c. These cats d. This cat

4. I can’t write a perfect English essay … I speak English fluently

a. but b. and c. in order to d. neither

5. Can I borrow your eraser? …

a. Yes, you have c. yes, you can

b. Yes, you can’t  d. yes, you should borrow

6. They are …

a. a doctor b. an nurse c. soldiers d. a farmer

7. Which sentence is correct?

a. Are you feel hungry  c. Do you hungry

b. Do you feel hungry d. You hungry, aren’t you?

8. What do you usually do … the holiday with your family? My family visit my grandparents and travel to the U.S.A

a. at b. between c. to d. in

9. … are they? They are newly married couple.

a. Who b. whose c. how d. which

10. We … the final exam next week, right?

a. Has b. have c. had d. are having

Bài 3. Điền vào chỗ trống

Dạng bài tập điền vào chỗ trống

1. OCT_BER

2. E N _RGY

3. CL_CK

4. WI_H

5. OR_NGE

6. PU_IL

7. BR_WN

8. R_LER

9. TH_RSDAY

10. COU_IN

Bài 4: Hoàn thành câu

Dạng bài tập hoàn thành câu tiếng Anh lớp 6

1. Christmas/you/a/ Wish/Merry!

2. people/Hoa’s family/are/How/there/many/in?

3. usually/plants/grandfather/roses/my/violets/and/in/garden/his.

4. Peter/buy/Harry Potter/for/young/his/comics/wants/brother/to.

5. father/me/to/allow/My/watch/doesn’t/TV/evening/the/in.

6. tomorrow/we/When/meet/will?

7. much/apples/4/are/How?

8. safe/It/go/in/evening/Don’t/!/is/out/the/not/!.

9.I/your/please/Can/borrow/ruler?.

10. May / I / come / in?

Bài 5. Chọn đáp án đúng

Bài tập chọn đáp án đúng lớp 6

1. Where … she … from?

a. Is / come b. does / come c. does / come d. is / comes

2. When … she ... to the party tonight?

a. Do / go  b. does / goes  c. is / going d. will / doing

3. How many candles are …?

a. in b. that c. here d. there

4. Peter and Annay …. in the Sunday morning, they are traveling to Phu Quoc Island in their honeymoon.

a. have just married b. marry c. has just married d. just married

5. … are they? They are actors.

a. Who b. which c. what d. where

6. All schools in Vietnam begin … September annual.

a. At b. to c. after d. before

7. You don’t noodles, ….?

a. are you b. aren’t you c. don’t you  d. do you

Đáp án đề thi tiếng đề thi iOE tiếng Anh lớp 6 cấp huyện

Bài 1:

1. thank

2. ess

3. often

4. Whose

5. introduce

6. look

7. much

8. past

9. ith

10. there

Bài 2: Chọn đáp án đúng

1. a

2. d

3. c

4. a

5. c

6. c

7. b

8. d

9.a

10. We … the final exam next Monday

a. Has b. have c. had d. are having

Bài 3. Điền vào chỗ trống

1. OCTOBER

2. ENERGY

3. CLOCK

4. WITH

5. ORANGE

9. TH_RSDAY

10. COU_IN

Bài 4: Hoàn thành câu

Dạng bài tập hoàn thành câu tiếng Anh lớp 6

1. Christmas/you/a/ Wish/Merry!

2. people/Hoa’s family/are/How/there/many/in?

3. usually/plants/grandfather/roses/my/violets/and/in/garden/his.

4. Peter/buy/Harry Potter/for/young/his/comics/wants/brother/to.

5. father/me/to/allow/My/watch/doesn’t/TV/evening/the/in.

6. tomorrow/we/When/meet/will?

7. much/apples/4/are/How?

8. safe/It/go/in/evening/Don’t/!/is/out/the/not/!.

9.I/your/please/Can/borrow/ruler?.

10. May / I / come / in?

Bài 5. Chọn đáp án đúng

Bài tập chọn đáp án đúng lớp 6

1. Where … she … from?

a. Is / come b. does / come c. does / come d. is / comes

2. When … she ... to the party tonight?

a. Do / go  b. does / goes  c. is / going d. will / doing

3. How many candles are …?

a. in b. that c. here d. there

4. Peter and Annay …. in the Sunday morning, they are traveling to Phu Quoc Island in their honeymoon.

a. have just married b. marry c. has just married d. just married

5. … are they? They are actors.

a. Who b. which c. what d. where

6. All schools in Vietnam begin … September annual.

a. At b. to c. after d. before

7. You don’t noodles, ….?

a. are you b. aren’t you c. don’t you  d. do you

Đáp án đề thi tiếng đề thi iOE tiếng Anh lớp 6 cấp huyện

Bài 1:

1. thank

2. ess

3. often

4. Whose

5. introduce

6. look

7. much

8. past

9. ith

10. there

Bài 2: Chọn đáp án đúng

1. a

2. d

3. c

4. a

5. c

6. c

7. b

8. d

9.a

10. We … the final exam next Monday

a. Has b. have c. had d. are having

Bài 3. Điền vào chỗ trống

1. OCTOBER

2. ENERGY

3. CLOCK

4. WITH

5. ORANGE

26 tháng 9 2021
Mình bít nè mình lớp 9 nè

19) Ta có: \(\sqrt[3]{x^3+9x^2}=x+3\)

\(\Leftrightarrow x^3+9x^2=\left(x+3\right)^3\)

\(\Leftrightarrow x^3+9x^2=x^3+9x^2+27x+27\)

\(\Leftrightarrow27x+27=0\)

\(\Leftrightarrow27x=-27\)

hay x=-1

Vậy: S={-1}

6) Ta có: \(\sqrt{9x^2-6x+1}-x=4\)

\(\Leftrightarrow\sqrt{\left(3x-1\right)^2}=x+4\)

\(\Leftrightarrow\left|3x-1\right|=x+4\)

\(\Leftrightarrow\left[{}\begin{matrix}3x-1=x+4\left(x\ge\dfrac{1}{3}\right)\\1-3x=x+4\left(x< \dfrac{1}{3}\right)\end{matrix}\right.\)

\(\Leftrightarrow\left[{}\begin{matrix}3x-x=4+1\\-3x-x=4-1\end{matrix}\right.\Leftrightarrow\left[{}\begin{matrix}2x=5\\-4x=3\end{matrix}\right.\)

\(\Leftrightarrow\left[{}\begin{matrix}x=\dfrac{5}{2}\left(nhận\right)\\x=\dfrac{-3}{4}\left(nhận\right)\end{matrix}\right.\)

Vậy: \(S=\left\{\dfrac{5}{2};\dfrac{-3}{4}\right\}\)

 

8)

ĐKXĐ: \(x>2\)

Ta có: \(\sqrt{x^2+2x+4}=x-2\)

\(\Leftrightarrow x^2+2x+4=\left(x-2\right)^2\)

\(\Leftrightarrow x^2+2x+4-x^2+4x-4=0\)

\(\Leftrightarrow6x=0\)

hay x=0(loại)

Vậy: \(S=\varnothing\)

9) Ta có: \(\sqrt{x^2-6x+9}=5\)

\(\Leftrightarrow\sqrt{\left(x-3\right)^2}=5\)

\(\Leftrightarrow\left|x-3\right|=5\)

\(\Leftrightarrow\left[{}\begin{matrix}x-3=5\\x-3=-5\end{matrix}\right.\Leftrightarrow\left[{}\begin{matrix}x=8\\x=-2\end{matrix}\right.\)

Vậy: S={8;-2}

25 tháng 2 2021

I)1.B

2.B

3.C

4.D

5.C

II)

1.B

2.D

3.B

4.B

5.A

6.B

7.tell....way.

8.C

III)

1.isn't teaching

2.drive

3.has