Ответ:
Объяснение:
log₂²x + 2log₂x - 3 = 0
ОДЗ: х > 0
Пусть t = log₂x
t² + 2t - 3 = 0
D = 2² - 4 * (- 3) = 4 + 12 = 16
1) log₂x = 1
x = 2¹
x = 2
2) log₂x = - 3
x = 2⁻³
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Ответ:
Объяснение:
log₂²x + 2log₂x - 3 = 0
ОДЗ: х > 0
Пусть t = log₂x
t² + 2t - 3 = 0
D = 2² - 4 * (- 3) = 4 + 12 = 16
1) log₂x = 1
x = 2¹
x = 2
2) log₂x = - 3
x = 2⁻³