Logarithmic functions > Logarithmic equations
12345Logarithmic equations

Exercises

Exercise 1

Draw the graph of the function f ( x ) = 1 - 3 log ( x + 4 ) .

a

Write down the domain and range of f .

b

Solve algebraically: f ( x ) > 0 .

Exercise 2

Draw the graph of the function g ( x ) = - 10 + 2 1 3 log ( x - 1 ) .

a

Write down the domain and the range of g .

b

Solve algebraically: g ( x ) -14 .

Exercise 3

Solve algebraically:

a

3 log ( x ) = 2 3 log ( 5 )

b

1 3 log ( x ) = 1 3 log ( 5 ) + 1 3 log ( 2 )

c

5 - 2 log ( x ) = 0

d

5 log ( x ) = 3 + 4 5 log ( 3 )

e

1 3 log ( x ) = 1 3 log ( 5 ) + 1 3 log ( 2 - x )

f

5 log ( x ) = 3 + 4 5 log ( x )

Exercise 4

Given the functions f ( x ) = log ( x ) and g ( x ) = -1 + log ( 4 - x ) .

a

For each function, determine the domain, the range and the asymptote.

b

Solve algebraically: f ( x ) = g ( x ) .

c

Solve: f ( x ) g ( x ) .

d

Solve: f ( x ) > g ( x ) .

Exercise 5

Express q in terms of p :

a

p = 15 - 3 log ( 5 - q )

b

p = 600 + 15 log ( q 200 )

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