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olezhkanoskovv
@olezhkanoskovv
July 2022
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10 класс, логарифмы, вычислите:
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sangers1959
Verified answer
A) 15^(2-log₁₅9)=15²*15^(-log₁₅9)=225/15^(log₁₅9)=225/9=25.
b) 2*log₁/₅5+log₁/₅5+0,5*log₁/₅25=log₁/₅5²+log₁/₅5+log₁/₅√25=
=log₁/₅25+log₁/₅5+log₁/₅5=log₁/₅(25*5*5)=-log₅625=-log₅5⁴=-4*log₅5=-4.
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Verified answer
A) 15^(2-log₁₅9)=15²*15^(-log₁₅9)=225/15^(log₁₅9)=225/9=25.b) 2*log₁/₅5+log₁/₅5+0,5*log₁/₅25=log₁/₅5²+log₁/₅5+log₁/₅√25=
=log₁/₅25+log₁/₅5+log₁/₅5=log₁/₅(25*5*5)=-log₅625=-log₅5⁴=-4*log₅5=-4.