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August 2022
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При каком значении n в4ыполняется равенство (3n – 1)2 = 81?
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Regent1828
Verified answer
(3n - 1)² = 81
3n - 1 = 9 3n - 1 = -9
3n = 10 3n = -8
n = 3 1/3 n = -2 2/3
Ответ: {- 2 2/3; 3 1/3}
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Answers & Comments
Verified answer
(3n - 1)² = 813n - 1 = 9 3n - 1 = -9
3n = 10 3n = -8
n = 3 1/3 n = -2 2/3
Ответ: {- 2 2/3; 3 1/3}