Giúp mk vs mn ơi 

\(2^{x+1}=4^7:8^3\\ \Rightarrow2^{x+1}=2^{14}:2^9\\ \Rightarrow2^{x+1}=2^5\\ \Rightarrow x+1=5\\\Rightarrow x=4\)

vì 4:3=2x2=4 hihi 

4:3=2

4:3 là  tứ chia tam là tám chia tư

vậy 8:4=2

cc

3³⁰⁰⁰ = ( 3³ )¹⁰⁰⁰ = 27¹⁰⁰⁰

4²⁰⁰⁰ =( 4² )¹⁰⁰⁰ = 16¹⁰⁰⁰

Vì 27¹⁰⁰⁰ > 16¹⁰⁰⁰ nên 3³⁰⁰⁰ > 4²⁰⁰⁰

Ta co :    3³⁰⁰⁰ = (3.3)¹⁰⁰⁰ = 9¹⁰⁰⁰

              4²⁰⁰⁰ = (4.2)¹⁰⁰⁰ = 8¹⁰⁰⁰

Vì : 9 > 8 nên 9¹⁰⁰⁰ > 8¹⁰⁰⁰. 

Vay 3³⁰⁰⁰ > 4²⁰⁰⁰

k mk nha bn

Ta có:

3^3000=(3^3)^1000=27^1000

4^2000=(4^2)^1000=16^1000

Vì 27>16

=>27^1000>16^1000

vậy 3^3000>4^2000

\(A=3x+12\)

\(=3\left(x+4\right)\)

\(B=\left(x+1\right)\left(x^2-64\right)\)

\(=\left(x+1\right)\left(x^2-8^2\right)\)

\(=\left(x+1\right)\left(x+8\right)\left(x-8\right)\)

\(C=x^2-256\)

\(=x^2-16^2\)

\(=\left(x-16\right)\left(x+16\right)\)

2 she had got the price of the contest, she would be happy now

3 I had gone to the concert last night ,I would be tired

4 John had finished all his homework, he could see a movie now

5 we had listened to my mother, we wouldn't be in trouble right now

Ex5

1 you arrive at the offcie earlier than I do, please turn on the air-conditioner

2 Were it not snowy, the children would go to school

3 he not died so young, he would be a famous musician

4 Were I you, I would take care of my car

5 not very bad-tempered, his wife would give him soon are marrage

6 Had she not got married at such an early age, he would be at university

`@` `\text {Ans}`

`\downarrow`

`a)`

`4x = 320 \div 16`

`=> 4x = 20`

`=> x = 20 \div 4`

`=> x=5`

Vậy, `x=5`

`b)`

`(x-10) \div 5 = 2`

`=> x - 10 = 2*5`

`=> x - 10 = 10`

`=> x = 10 + 10`

`=> x=20`

Vậy, `x=20`

`c)`

`(20+x) \div 5 = 25`

`=> 20+x = 25*5`

`=> 20+x = 125`

`=> x = 125 - 20`

`=> x = 105`

Vậy, `x=105.`

`@` `\text {Kaizuu lv uuu}`

Tham khảo

- Vì trời mưa nên tôi không thể đi học.

- Nếu tôi là bạn tôi sẽ chăm chỉ học tập.

- Tuy Nam học không giỏi nhưng bạn ấy rất cố gắng.

Tuy nhà nghèo nhưng Nam vẫn cố gắng học

Nếu trời nắng chúng ta sẽ đi chơi

Không chỉ học giỏi mà Lan còn rất tốt bụng