Question

4 . 2^x - 3 = 125

tìm x

Answer 1

\(4.2^x-3=125\)

\(4.2^x=125+3=128\)

\(4.2^x=128\)

\(2^x=128:4\)

\(2^x=32\)

\(2^x=2^5\Rightarrow x=5\)

Answer 2

4 . 2^x - 3 = 125

4 . 2^x = 125 + 3

4 . 2^x = 128

2^x = 128 : 4

2^x = 32

Suy ra : 32 = 2⁵

Vậy x = 5

Answer 3

4 . 2^x - 3 = 125

4 . 2^x = 125 + 3 

4 . 2^x = 128

2^x = 128 : 4 

2^x = 32

suy ra x= 5 

nhé !