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m672
@m672
July 2022
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Найти разницу a-b если
[tex]21^{a+b} = 3^7 * 3^{3a-14}[/tex]
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Удачник66
Verified answer
Здесь ошибка
21^(a+b) = 3^7*7^(3a-14)
3^(a+b)*7^(a+b) = 3^7*7^(3a-14)
{ a+b = 7
{ a+b = 3a-14
3a-14 = 7
a = 7, b = 7 - a = 0
a - b = 7
2 votes
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Answers & Comments
Verified answer
Здесь ошибка
21^(a+b) = 3^7*7^(3a-14)
3^(a+b)*7^(a+b) = 3^7*7^(3a-14)
{ a+b = 7
{ a+b = 3a-14
3a-14 = 7
a = 7, b = 7 - a = 0
a - b = 7