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yulia12345678
@yulia12345678
August 2022
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решите уравнение
3^(1-2x)=1
7^x-(1/7)^(1-x)=6
2^(2x+1)+7*2x-4=0
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Answers & Comments
belozerova1955
3¹⁻²ˣ=3⁰ 3⁰=1
1-2х=0
2х = 1
х=1/2
7ˣ- (1/7)¹⁻ˣ=6
7ˣ - 7ˣ⁻¹=6 (слева вынесем за скобку 7ˣ⁻¹)
7ˣ⁻¹(7¹ - 1) = 6
7ˣ⁻¹·6 = 6
7ˣ⁻¹=1 1=7⁰
7ˣ⁻¹=7⁰
х-1=0
х=1
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Answers & Comments
1-2х=0
2х = 1
х=1/2
7ˣ- (1/7)¹⁻ˣ=6
7ˣ - 7ˣ⁻¹=6 (слева вынесем за скобку 7ˣ⁻¹)
7ˣ⁻¹(7¹ - 1) = 6
7ˣ⁻¹·6 = 6
7ˣ⁻¹=1 1=7⁰
7ˣ⁻¹=7⁰
х-1=0
х=1