Pre-Calculus Logarithms

Evaluate the following logarithm:

log₅5

• 1

• 0

• -1

• ¹/₂

Evaluate the following logarithm:

log₄16

• 1

• -2

• 2

• ¹/₂

Evaluate the log by thinking " 3 to what power is 1/9" so

log₃(1/9) =

• 1/2

• 2

• -2

• 3

Re-write in log form 2⁶=64

• log₂6=64

• log₂64=6

• log₆₄2=6

• log₆₄6=2

Re-write in exponential form log₅625=4

• 5⁶²⁵=4

• 5⁴=625

• 4⁵=625

• 4²=16

The base of common log is 10. So log 100 = ?

• 1

• 2

• 10

• 50