7 200 000 nhé em

36 000 000 : 5 = 7 200 000

bằng 7200000

THAM KHẢO CÁCH RÚT GỌN DÒNG 3: Chứng minh đẳng thức lượng giác sin^4a + cos^4a = 1 - 1/2 sin^2 2a = 3/4 + 1/4 cos4a câu hỏi 1063664 - hoidap247.com

\(M=\sin^4\alpha\left(1+2\cos^2\alpha\right)+\cos^4\alpha\left(1+2\sin^2\alpha\right)\\ M=\left(\sin^4\alpha+\cos^4\alpha\right)+2\sin^2\alpha\cdot\cos^2\alpha\left(\sin^2\alpha+\cos^2\alpha\right)\\ M=\dfrac{3}{4}+\dfrac{1}{4}\cos4\alpha+\dfrac{1}{2}\sin^22\alpha\cdot1\\ M=\dfrac{3}{4}+\dfrac{1}{4}\cos4\alpha+\dfrac{1}{2}\sin^22\alpha\)

1. used to

2. is used to

3. used to

4. used to

5. was used to

6. am used to

7. used to

8. am used to

9. used to

10. used to

11. work

12. working

13. living

14. get

1.used to 2.is used to 3.used to 4.used to 5.is used to 6.am used to 7.used to 8.am used to 9.used to 10.used to 11.work 12.working 13.living 14.get up

TH1: 1,2 đứng đầu

=>Có \(2\cdot2\cdot4=16\left(cách\right)\)

TH2: 1,2 đứng giữa

Nếu số 0 đứng cuối thì có \(2\cdot1\cdot4=8\left(cách\right)\)

Nếu số 8 đứng cuối thì có \(2\cdot1\cdot3=6\left(cách\right)\)

=>Có 14 cách

TH3: 1,2 đứng cuối

=>Có \(1\cdot4\cdot3=12\left(cách\right)\)

=>Có 16+14+12=42 cách

Bạn đăng nội dung CH lên nhé!

1 cooks

2 didn't go - was

3 are you doing - am washing

4 isn't writing - think - is playing

5 Did she eat

6 usually drink - am having

7 saw - was

8 is singing - likes - took - felt

9 did he draw

10 always has - doesn't like

Hơi mờ mọi người thông cảm

Áp dụng tính chất của dãy tỉ số bằng nhau, ta được:

\(\dfrac{a}{12}=\dfrac{b}{9}=\dfrac{c}{8}=\dfrac{a+b+c}{12+9+8}=\dfrac{87}{29}=3\)

Do đó: a=36; b=27; c=24