помогите решить, 28 баллов. Created by Nastjaaliska. algebra-ru

помогите решить, 28 баллов...

September 2021 2 12 Report

помогите решить, 28 баллов

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1
a)log(16)8=log(2^4)(2³)=3/4
b)125^log(5)7=5^log(5)7³=7³=343
2
x²+7x-44>0
x1+x2=-7 U x1*x2=-44⇒x1=-11 u x2=4
x∈(-∞;-11) U (4;∞)
3
lgx=lg(100a^4/b³)=lg100+lga^4-lgb³=2+4lga-3lgb

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Васюта

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1.a)log₁₆8=log₂⁴2³=3/4
b)125^log₅7=5^log₅7³=7³=343
2.x²+7x-44>0
D=49+176=15²
x₁=4 x₂=-11
x∈(-∞; -11)∪(4;+∞)
3. lgx=lg(100a^4/b³)=lg100+lga^4-lgb³=2+4lga-3lgb

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