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28 August, 03:19

Se logx 25 = - 2, então log 5 x é igual a:

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  1. 28 August, 03:49
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    Your question is on Spanish but I'll try to answer it

    log x 25 = - 2 = > x^-2 = 25

    we know that x^-2 is the reciprocal value that is also written as (1/x) ^2, according to this

    => (1/x) ^2 = 5^2 = > 1/x = 5 = > x = 1/5

    Check log (1/5) 25 = x = > (1/5) ^x = 5^2 = > 5^-x = 5^2 = > - x=2 = >

    x = - 2 Good luck!
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