Subject

    Quantitative Aptitude

    Topic

    Power & Logarithm

    If log a/b + log b/a = log (a + b), then:

    ক)
    a + b = 1
    খ)
    a - b = 1
    গ)
    a = b
    ঘ)
    a2 - b2 = 1

    Explanation

    Log a/b + log b/a = log (a + b) => log (a + b) = log (a/b x b/a) = log 1. So, a + b = 1.

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