Question

1. Calcule

A) 2x² = 8

B) 2x = 128

C) 5x = 125

D) 7x = 343


2. Resolva as seguintes

A) 2³x- = 32

B) 7⁴x + 3 = 49

C) 11²x + ⁵ = 11

D) 2x²-x-16 = 16

E) 3x² + 2x = 243

F) 5²x² + 3x-² = 1

G) 81¹-3x = 27

me ajudem por favor galera​

Answer 1

Resposta:

1.

a) 2x²=8 -> x²=8/2-> x=√4 -> x=2

b) 2x=128 -> x=128/2 -> x=64

c) 5x=125 -> x=25

d) 7x=343 -> x=49

2.

a)2³x=32 -> 2.2.2.x=32 -> x=32/8 -> x= 4

b)7⁴x+3=49 +> 7.7.7.7.x=49-3 -> 2401x=46 -> x=0,019

c) faltam dados

d)

e)

f) 81¹-3x=27 -> 81-27=3x -> 54=3x -> x=18