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    Log Base 9 of 1/81

    Logarithm Calculator
    Log base
    x

    What is log₉(1/81)?

    Answer

    log9(1/81) =
    −2

    log9 is the log base 9.

    log9(1/81) is the power you raise 9 to, to get 1/81: 9y = 1/81.

    9⁻² = 1/9² = 1/81 ✓

    Oxy

    Answer point (1/81, −2).

    The curve y = log9 x passes through (1, 0) and (9, 1) and rises: for x > 1 the log is positive, for 0 < x < 1 negative.

    Log of 1/81 in different bases
    BaseNotationValue
    eln(1/81)≈ −4.3944
    10log(1/81)≈ −1.9085
    2log₂(1/81)≈ −6.3399
    9log₉(1/81)−2

    See Also

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    Log Base 9 of 1/81 (log₉(1/81)). log₉(1/81) = −2: the power you raise 9 to, to get 1/81. With the check and the graph.
    https://calculat.io/en/number/logarithm/9--1-81/generated.jpgCopy

    Log base 9 of nearby numbers

    xlog₉ x
    1/81−2
    31/2
    273/2
    Recalculate with different values ↑

    FAQ

    What is log₉(1/81)?

    log₉(1/81) = −2

    How to find log₉(1/81) without a calculator?

    Write 1/81 as a power of 9: 1/81 = 9⁻². The exponent is the answer: log₉(1/81) = −2.

    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