64 . 4^x = 168

<=> 43. 4^x = 416

=> 3 + x = 16

<=> x = 13

Vậy x = 13

2^x.16² = 1024

<=> 2^x. 2⁸ = 210

=> x + 8 = 10

<=> x = 2

Vậy x = 2

b: Ta có: \(2^x\cdot16^2=1024\)

\(\Leftrightarrow2^x\cdot2^8=2^{10}\)

\(\Leftrightarrow x+8=10\)

hay x=2

  64.4^x=16³

  2⁶. (2²)^x = (2⁴)³

=> 2⁶. 2^2x = 2¹²

        2^2x   = 2 ¹² : 2⁶

       2^2x   = 2⁶

  =>  2x = 6

         x = 6 :2

         x=3

- Vậy x =3

A

A

A

`@` `\text {Ans}`

`\downarrow`

`32^x \div 16^x = 128`

`=> (2^5)^x \div (2^4)^x = 2^7`

`=> 2^(5x) \div 2^(4x) = 2^7`

`=> 2^(5x - 4x) = 2^7`

`=> 2^x = 2^7`

`=> x = 7`

Vậy, `x = 7.`

x = 7

`32^{x} : 16^{x} = 128`

`=>(2^5)^{x} : (2^{4})^{x} = 2^7`

`=>2^{5x} : 2^{4x} = 2^{7}`

`=>2^{x} = 2^{7}`

`=>x = 7`

Vậy `x=7`

a ) 2^x = 32 
=> 2⁵       
b ) 3^x = 243
=> 3⁵
c ) 2^x = 256
=> 2⁸ 

a,x=5

b,x=5

c,x=8

120,130,140,150 nhiều lắm

mk trả lời nhầm câu nha

2^x . 4 = 16

2^x = 16 : 4

2^x = 4

x = 4 : 2

x = 2

3^x . 3 = 243

3^x = 243 : 3

3^x = 81

x = 81 : 3

x = 27

x³ = 216

=> x = 216 : 3

x = 72

3^x + 15 = 18

3^x = 18 - 15

3^x = 3

x = 3: 3

x = 1

tk cj nha

1

mau lên đi ạ

pls

1