Logaritmos

  • November 2019
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Lista de Exercícios – Logaritmo

Professor: Heráclito

Matemática

1- Calcule o valor de N em cada caso.

3- Resolva as equações, analisando

as condições de existência:

a) log(5 x − 10) = 1

a) N= log 2 32 + log 3 9 + 2 log 10

b) log2(x-3)=log2(x-2)+2

b) N = log 10 + log 2 8 − log 3 9

c) log x (2 x + 15) = 2

c) N= log 2 2 + log 3 27 + 2 log 100 − log 5 125 d) N = log 3 81 + log 100

d) log 2 (2 x − 5) = log 2 3

1 e) N = log   + log 5 25 4 2 f) log 3 81 − log 1000 − log 2 16 + log 2 3 64

2- Analise as condições de existência. 2 a) log ( x − 10 x)

b) log ( X −1) (4 − X ) c) log 5 ( x 2 + 4 x − 5)

e) log(2 x − 10) = 2 f) log(x-2)(x+1)=0

g) log 2 ( x − 4) = 3 h) log x −1 (1 − 2 x) = 2 i) log x + 2 (20 − 2 x) = 2 j) log x (3x 2 − x) = 2 k) log 2 (2 x − 6) = 4 log ( x 2 −1) (20 − 2 x) = 0

d) log( x − 3)

l)

e) log 2− x 4

m) log ( x −1) (20 − 2 x) = 2

4- Qual é o valor da expressão:

f) log( x − 2 x) 2

E= 2 g) log(2 x +

3 x) 2

2 h) log ( x +1) x − 4 x

i)

log( x + 3 x)

j)

log ( x +1) 8

2

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log 3 1 + log 0, 01 1 log 2 ⋅ log 4 8 . 64

5- Ache o valor da base a) log x 16 = 2 b) log x 5 = −1 Bom Divertimento

1

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