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Log 7 la puterea 8 + log 7 la puterea 14 -log 7 la puterea 6

Răspuns :

log(7⁸) + log(7¹⁴) - log(7⁶) = log(7⁸x7¹⁴:7⁶) = log (7⁸⁺¹⁴⁻⁶) = log (7¹⁶) = 16 log7