Question

Tìm x

5^x .25.125=25.5⁴⁰

2^x.64.16=8.2⁶⁰

Answer 1

2^x . 2⁶ . 2⁴ = 2³ . 2⁶⁰

2^{x + 6 + 4} = 2^{3 + 60}

2^{x + 10} = 2⁶³

=> x + 10 = 63

x = 63 - 10 

x = 53

Answer 2

a/ 5^x.5².5³=5².5⁴⁰

5^x.5⁵=5⁴²

5^x=5³⁷

x=37

b/ 2^x.2⁶.2⁴=2³.2⁶⁰

2^x.2¹⁰=2⁶³

2^x=2⁵³

x=53