Question

giúp

Answer 1

2 đó bn mk lm rùi

Answer 2

giup voi

 

Answer 3

5^x+1 - 5^x =100

5^x(5-1) = 100

5^x = 25 => x = 2

Answer 4

Ta có

5^x+1-5^x=100

=> 5^x(5-1)=100

=>5^x=25 => 5^2=25

vậy x=2