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Иисус1
@Иисус1
August 2021
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решите пять логарифмов
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tatianahumanity
1)㏒₆х=1-㏒₆3
㏒₆х+㏒₆3=1
㏒₆3·х=1
6¹=3х
х=2
2) ㏒₂х+㏒₄х+㏒₈х=11
㏒₂х+1/2(㏒₂х)+1/3(㏒₂х)=11
11/6(㏒₂х)=11
㏒₂х=6
2⁶=х
х=64
3)㏒₁₀х=2-㏒₁₀5
㏒₁₀х+㏒₁₀5=2
㏒₁₀5х=2
10²=5х
100=5х
х=20
4)㏒₁₀(2х-3)=-1
10⁻¹=2х-3
1/10=2х-3
5)㏒₁₀(2х-3)=-1
㏒₁₀(2х-3)=-㏒₁₀10
㏒₁₀(2х-3)+㏒₁₀10=0
㏒₁₀(2х-3)·10=0
10⁰=(2х-3)·10
1=20х-30
31=20х
х=31÷20=1.55
х=1.55
5) ㏑(4-7х)=0
e⁰=1
1=4-7x
7x=3
x=3/7
1 votes
Thanks 1
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Answers & Comments
㏒₆х+㏒₆3=1
㏒₆3·х=1
6¹=3х
х=2
2) ㏒₂х+㏒₄х+㏒₈х=11
㏒₂х+1/2(㏒₂х)+1/3(㏒₂х)=11
11/6(㏒₂х)=11
㏒₂х=6
2⁶=х
х=64
3)㏒₁₀х=2-㏒₁₀5
㏒₁₀х+㏒₁₀5=2
㏒₁₀5х=2
10²=5х
100=5х
х=20
4)㏒₁₀(2х-3)=-1
10⁻¹=2х-3
1/10=2х-3
5)㏒₁₀(2х-3)=-1
㏒₁₀(2х-3)=-㏒₁₀10
㏒₁₀(2х-3)+㏒₁₀10=0
㏒₁₀(2х-3)·10=0
10⁰=(2х-3)·10
1=20х-30
31=20х
х=31÷20=1.55
х=1.55
5) ㏑(4-7х)=0
e⁰=1
1=4-7x
7x=3
x=3/7