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Вычислите. loq 2 4 loq 5 25 loq 4 16 loq 25 625 loq 6 216. loq a ( b∙c )= loq a b+loq a c loq a = loq a b - loq a c loq a b r = r∙ loq a b Доказательство на доске. Свойства логарифмов. loq 6 18+loq 6 2=loq 6 (18∙2) =loq 6 36 =2

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  1. Вычислите

  2. loq24 loq525 loq416 loq25625 loq6216

  3. loqa(b∙c)=loqab+loqac loqa=loqab - loqa c loqabr=r∙loqab Доказательство на доске Свойства логарифмов

  4. loq6 18+loq6 2=loq6 (18∙2) =loq6 36 =2 loq12 48 – loq12 4=loq12 (48:4)= loq12 12 = 1 loq3 32= 2∙loq3 3 = 2∙1 = 2 № 290(1,3), № 291(1,3),№ 292(2,4), № 293(3,4) на уроке д/з №№290(2,4),291(2,4),293(1,2) Примеры

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