Question

URGENTE!
Determine o expoente nos casos a seguir:
a) 2× = 1/8
b) (9/8)× = 1
c) (3/10)× = 0,09

Answer 1

a)2^x = 1/8
2^x = 1/2³
2^x = 2^-3
x = -3

b)(9/8)^x = 1
(9/8)^x = (9/8)^0
x = 0

c)(3/10)^x = 0,09
(3/10)^x = 9/100
(3/10)^x = 3² / 10²
(3/10)^x = (3/10)²
x = 2