Question

Resolva em R, as seguintes equaçoes exponenciais: 

A) 3ˣ=81

B) 2ˣ= 256

C) 7ˣ= 7

D) 5ˣ⁺²= 125

E) (1/3)ˣ=81

Answer 1

3^x = 3^4
x = 4 ✓

2^x = 2^8
x = 8 ✓

7^x = 7^1
x = 1 ✓

5^x+2 = 5^3
x+2 = 3
x = 1 ✓

(1/3)^x = 3⁴
(1/3)^x = (1/3)^-4
x = -4 ✓

Answer 2

c). 7^x = 7
7^x = 7^1
x = 1