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Mach768
Mach768 asked in Science & MathematicsMathematics · 7 years ago

How to combine this expression into a single logarithm? ln x + lnx - ln7?

Show steps please, really need help on this, thanks

2 Answers

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  • Grid
    Lv 7
    7 years ago

    2lnx - ln7 = ln(x^2) - ln 7 = ln(x^2 / 7)

  • Jake
    7 years ago

    ln x + lnx - ln7

    ln(x^2) - ln7

    ln (x^2 / 7)

    It's based off of the log rules.

    log a + log b = log ab

    log a - log b = log a/b

    vice versa

    log ab = log a + log b

    log a/b = log a - log b

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