Question

5^x-1=5²

3^x=9¹⁰

2^x=8³

2^2x-3=2⁹

Answer 1

5^x-1  = 5^2 

5^x : 5 = 5^2 

5^x = 5^2 * 5

5^x = 5^3

x=3

----------------------------

3^x = 9^10

3^x = (3^2)^10

3^x = 3^20

x=20

--------------------------------

2^x = 8^3 

2^x = (2^3)^3

2^x = 2^9

x=9

-------------------------------

2^2x-3 = 2^9

2^2x : 2^3 = 2^9

2^2x = 2^9 * 2^3

2^2x = 2^12

2x = 12

x=6

Answer 2

a/ 5^x-1 = 5² => x - 1 = 2 => x = 3

b/ 3^x = 9¹⁰ => 3^x = (3²)¹⁰ => 3^x = 3²⁰ => x = 20

c/ 2^x = 8³ => 2^x = (2³)³ => 2^x = 2⁹ => x = 9

d/ 2^2x-3 = 2⁹ => 2x - 3 = 9 => 2x = 12 => x = 6

Answer 3

5^x-1=5²

=>x-1=2

=>x=3

3^x=9¹⁰

=>3^x=(3²)¹⁰

=>3^x=3²⁰

=>x=20

 2^x=8³

=>2^x=(2³)³

=>2^x=2⁹

=>x=9

2^2x-3=2⁹

=>2x-3=9

=>2x=12

=>X=6

Answer 4

5^x-1=5^2  =>x-1=2

                     x=3

3^x=9^10 =>3^x=(3^3)^10  =>3^x=3^30

                                           =>x=30

2^x=8^3  =>2^x=(2^3)^3  =>2^x=2^9

                                       =>x=9

2^2x-3=2^9  =>2x-3=9

                      2x=12

                        x=6

Chuc ban may man trong cuoc song !!!!!