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19 June, 16:44

Solve log base 3 of 81 equals x

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  1. 19 June, 18:16
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    Log (base3) 81 = x

    One of the log identities is

    Log (base x) x = 1

    We can rewrite 81 in terms of 3 so that we can use the identity.

    Log (base 3) 3^4 = x

    The power rule lets us bring the 4 in front as a coefficient so,

    4 * log (base3) 3 = 81

    4 * 1 = x

    4 = x
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