Log Base 3 of 81
Logarithm Calculator
What is log₃ 81?
Answer
log3 81 =
4
log3 is the log base 3.
log3 81 is the power you raise 3 to, to get 81: 3y = 81.
3⁴ = 81 ✓
Answer point (81, 4).
The curve y = log3 x passes through (1, 0) and (3, 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
FAQ
What is log₃ 81?
log₃ 81 = 4
How to find log₃ 81 without a calculator?
Write 81 as a power of 3: 81 = 3⁴. The exponent is the answer: log₃ 81 = 4.
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 Base 3 of 1/9 (log₃(1/9))
- Log Base 3 of 2 (log₃ 2)
- Log Base 3 of 3 (log₃ 3)
- Log Base 3 of 4 (log₃ 4)
- Log Base 3 of 5 (log₃ 5)
- Log Base 3 of 6 (log₃ 6)
- Log Base 3 of 7 (log₃ 7)
- Log Base 3 of 8 (log₃ 8)
- Log Base 3 of 9 (log₃ 9)
- Log Base 3 of 27 (log₃ 27)
- Log Base 4 of 0.0625 (log₄ 0.0625)
- Log Base 4 of 1 (log₄ 1)
- Log Base 4 of 2 (log₄ 2)
- Log Base 4 of 3 (log₄ 3)
- Log Base 4 of 4 (log₄ 4)
- Log Base 4 of 5 (log₄ 5)
- Log Base 4 of 6 (log₄ 6)
- Log Base 4 of 8 (log₄ 8)
- Log Base 4 of 16 (log₄ 16)
- Log Base 4 of 25 (log₄ 25)
- Логарифм 81 по основанию 3 (log₃ 81)
- Logaritmo en base 3 de 81 (log₃ 81)
- Logaritmo de 81 na base 3 (log₃ 81)