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    Mathematics A-Level

    natural logarithm

    What natural logarithm means in Mathematics A-Level, as defined for AQA, WJEC.

    Definitions of natural logarithm

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    Reference: WJEC

    The function y = ln x is defined as the logarithm to base e, so y = ln x ⇔ eʸ = x.
    WJEC · Exponentials and logarithms (AS Unit 1: Pure Mathematics A)
    ln x is log base e of x; it is defined for x > 0 and is the inverse of e^x.
    AQA · F: Exponentials and logarithms (study guide)

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