AP PreCalculus Topics 2.9-2.11 Logarithmic Functions

Rewrite log₂8 = 3 in exponential form.

• 2⁸ = 3
• 2³ = 8
• 3² = 8
• 8³ = 2

Rewrite 3⁴ = 81 in logarithmic form.

• log₃4 = 81

• log₈₁3 = 4

• log₃81 = 4

• log₄81 = 3

log₅25 = ?

• 2
• 5
• 125
• 10

ln(e^W)

• e

• W

• e^W

• undefined

What is the value of log₅25?

• 2

• 5

• 125

• 10

Evaluate log₄(1)

• 1

• 0

• 4

• undefined

Evaluate log_b(b)

• -1
• 0
• 1
• b

Evaluate:
log₄16

• 2
• 4
• 1/2
• -2

Find the corresponding graph of
 $-\log_2\left(x\right)+3$  

• 
• 
• 
• 

Logarithmic functions are the inverse of...

• Linear Functions

• Exponential Functions

• Quadratic Functions

• Polynomial Functions