Log Basics

Evaluate.
log₃81

• 4
• ¹/₄
• -4
• -¹/₄

Tags

CCSS.HSF.BF.B.5

Write in exponential form.
log₂32 = 5

• 2^-5 = 32
• 2³² = 5
• 2⁵ = 32
• 32⁵ = 2

Tags

CCSS.HSF.BF.B.5

Write in logarithmic form.
5² = 25

• log₅2 = 25
• log₂25 = 5
• log₂₅5 = 2
• log₅25 = 2

Tags

CCSS.HSF.BF.B.5

Write in exponential form.
log₂(¹/₈) = -3

• 2^-3 = ¹/₈
• 2^1/8 = -3
• -3² = ¹/₈
• -3^1/8 = 2

Tags

CCSS.HSF.BF.B.5

Rewrite 3⁴ = 81 in logarithmic form.

• log₃4 = 81
• log₈₁3 = 4
• log₃81 = 4
• log₄81 = 3

Tags

CCSS.HSF.BF.B.5

Evaluate.
3 log₂4

• 3
• 6
• 2
• 4

Tags

CCSS.HSF.BF.B.5

CCSS.HSF.LE.A.4

If it is not shown, what base does ln (natural log) use?

Example: ln10 = 2.303

• e

• 10

• 1

• 0

Tags

CCSS.HSF.BF.B.5

If not shown, what base does log use?

Example: log100 = 2

• 2

• e

• 10

• 1

Tags

CCSS.HSF.BF.B.5

Evaluate: log(-10)

• not possible/error

• 1

• 0

• .001

Tags

CCSS.HSF.BF.B.5

How many decimal do we round our answers to?

• 1

• 2

• 3

• 4

Tags

CCSS.5.NBT.B.7