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yuliyagl
@yuliyagl
June 2022
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lg (x^2 +2x-3)=lg (x-3)
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danulpopov
ОДЗ:
x² +2x -3 > 0 и x-3 > 0
(x-1)(x+3)>0 и x > 3
Общее одз: x > 3
x² +2x -3 = x - 3
x² +x = 0
x = 0; x = -1 // не удв. ОДЗ
Ответ: x∉∅
1 votes
Thanks 2
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Answers & Comments
x² +2x -3 > 0 и x-3 > 0
(x-1)(x+3)>0 и x > 3
Общее одз: x > 3
x² +2x -3 = x - 3
x² +x = 0
x = 0; x = -1 // не удв. ОДЗ
Ответ: x∉∅