6.Oblicz: a) log2 8+log2 7- log1 jedna siódma= b) log3 siedem dwunastych-log3 trzy ósme+log3 sześć siódmych-log3 sześc dwudziestych siódmych=
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6.Oblicz:
a) log2 8 + log2 7 - log2 1/7 = log2 2^3 + log2 (7 : 1/7) = 3 * log2 2 + log2 49 = 1 + log2 49
b)
log3 7/12 - log3 3/8 + log3 6/7 - log3 6/27 =
log3 (7/12 : 3/8 * 6/7 : 6/27) = log3 (7/12 * 8/3 * 6/7 * 27/6) = log3 6