x = log 5 [ 9 ] + 2 *( log 5 [ 1] - log 5 [ 3 ] ) =
= log 5 [ 9] + 2 * ( log 5 [ 1/3] = log 5[ 9 ] + log 5 [ (1/3)^2 ] =
= log 5 [ 9 ]+ log 5 [ 1/9 ] = log 5 [ 9*(1/9) ] = log 5 [ 1 ] = 0 - czyli liczba całkowita
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x = log 5 [ 9 ] + 2 *( log 5 [ 1] - log 5 [ 3 ] ) =
= log 5 [ 9] + 2 * ( log 5 [ 1/3] = log 5[ 9 ] + log 5 [ (1/3)^2 ] =
= log 5 [ 9 ]+ log 5 [ 1/9 ] = log 5 [ 9*(1/9) ] = log 5 [ 1 ] = 0 - czyli liczba całkowita