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Ответ дал:
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log₇²x - 3log₇x + 4 = 4
log₇x = t
t² - 3t = 0
t (t - 3) = 0
t = 0 или t - 3 = 0
t = 3
1) t = 0
log₇x = 0
x = 1
2) t = 3
log₇x = 3
x = 7³ = 343
log₇x = t
t² - 3t = 0
t (t - 3) = 0
t = 0 или t - 3 = 0
t = 3
1) t = 0
log₇x = 0
x = 1
2) t = 3
log₇x = 3
x = 7³ = 343
Ответ дал:
0
log₇²x - 3log₇x + 4 = 4
log₇x = t
t² - 3t = 0
t (t - 3) = 0 t - 3 = 0
t = 3
1) t = 0
log₇x = 0
x = 1
2) t = 3
log₇x = 3
x = 7³ = 347
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