Log Base 81 of 27
Logarithm Calculator
What is log₈₁ 27?
Answer
log81 27 =
3/4 = 0.75
log81 is the log base 81.
log81 27 is the power you raise 81 to, to get 27: 81y = 27.
813/4 = (∜81)³ = 3³ = 27 ✓
Answer point (27, 3/4).
The curve y = log81 x passes through (1, 0) and (81, 1) and rises: for x > 1 the log is positive, for 0 < x < 1 negative.
See Also
- Square Root Calculator - Calculate the square root of any number
- Simplify Square Root Calculator - Write any square root in simplest radical form, step by step
- Scientific Calculator with Memory & History - Free Engineering Calculator Online with Memory Function, Operation History, Logarithms & Trigonometry. Similar to ti-83, ti-84, ti-89
Log base 81 of nearby numbers
| x | log₈₁ x |
|---|---|
| 27 | 3/4 |
FAQ
What is log₈₁ 27?
log₈₁ 27 = 3/4 = 0.75
Why is log₈₁ 27 a fraction?
Both numbers are powers of 3: 81 = 3⁴ and 27 = 3³, so 27 = 81^(3/4) and log₈₁ 27 = 3/4 = 0.75.
What does log without a base mean?
At school and on a calculator, log x without a base is the common log, base 10: log 100 = 2. In Python, math.log(x) is the natural log ln x; in Excel, LN is the natural log and LOG is base 10.
See Also
- Log of 81 (Base 10)
- Log of 100 (Base 10)
- Log of 200 (Base 10)
- Log of 512 (Base 10)
- Log of 1000 (Base 10)
- Log of 7000000 (Base 10)
- Log of e (Base 10)
- Log Base 13 of 13 (log₁₃ 13)
- Log Base 16 of 1 (log₁₆ 1)
- Log Base 25 of 5 (log₂₅ 5)
- Log Base 100 of 10 (log₁₀₀ 10)
- Natural Log of −1 (ln(−1))
- Natural Log of −2 (ln(−2))
- Natural Log of −5 (ln(−5))
- Natural Log of 0 (ln 0)
- Natural Log of 0.01 (ln 0.01)
- Natural Log of 0.1 (ln 0.1)
- Natural Log of 0.2 (ln 0.2)
- Natural Log of 0.4 (ln 0.4)
- Natural Log of 0.5 (ln 0.5)
- Логарифм 27 по основанию 81 (log₈₁ 27)
- Logaritmo en base 81 de 27 (log₈₁ 27)
- Logaritmo de 27 na base 81 (log₈₁ 27)