Question

Determine o valor de x nas equações: a) 10^x = 0,01 b) 2/3^x = 9/4

Answer 1

a)10^x = 0,01
10^x = 1/100
10^x = 1/10^2
10^x = (10)^-2
x = - 2

b)(2/3)^x = 9/4
(2/3)^x = 3²/2²
(2/3)^x = (3/2)²
(2/3)^x = (2/3)^-2
x = - 2