Exercícios de exponenciação: A) 25²ˣ = √125 B) 2ˣ = ∛4 C) 3²ˣ = 1/243.... Pergunta de ideia deTitaniun2000

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January 2020 1 123 Report

Exercícios de exponenciação:

A) 25²ˣ = √125

B) 2ˣ = ∛4

C) 3²ˣ = 1/243

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PauloBarros A)
2x
25 =   √125

1
-----
2.2x 2
5 = 125

(1/2)
4x 3
5 = 5

4x 3/2
5 = 5

4x = 3
----
  2

2.4x = 3
8x = 3
x = 3
----
8

**************************
b)

x
2 = ∛ 4

x
2 =   ∛2²

x 2/3
2 = 2

x = 2
-----
3

********************************
c)

2x
3 = 1
-------
243

2x
3 = 1
----------
3⁵

2x - 5
3 = 3

2x = - 5

x = - 5
-----
2

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