Question

resolva a equação exponencial 25=100.(0,5)^x

Answer 1

25 = 100 . (1/2)^x
25/100 = (1/2)^x
1/4 = (1/2)^x
4^-1 = 2^-x
2^-2 = 2^-x
-x = -2
x = 2

Answer 2

 Olá! :)


 25 = 100 . ( 1 / 2 ) ^ x

 25 / 100 = ( 1 / 2 ) ^ x

 1 / 4 = ( 1 / 2 ) ^ x

 4 ^ - 1 = 2 ^ - x

 2 ^ - 2 = 2 ^ - x

 - x = - 2

 x = 2


 Abraços! :)