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Sasha9290
@Sasha9290
July 2022
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Логарифмы. Решите неравенства. №28, 29
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kirichekov
Verified answer
28. lgx≥1
ОДЗ: x>0
1=lg10
lgx≥lg10
основание логарифма а=10, => знак неравенства не меняем.
x∈(0;10]
1+ 2+ 3+4+5+6+ 7+8+ 9+ 10=55
29. log₀,₅x≥-2
ОДЗ: x>0
log₀,₅x ≥log₀,₅4
основание логарифма а=0,5. 0<0,5<1, => знак неравенства меняем
x∈(0;4]
1*2*3*4=24
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Answers & Comments
Verified answer
28. lgx≥1ОДЗ: x>0
1=lg10
lgx≥lg10
основание логарифма а=10, => знак неравенства не меняем.
x∈(0;10]
1+ 2+ 3+4+5+6+ 7+8+ 9+ 10=55
29. log₀,₅x≥-2
ОДЗ: x>0
log₀,₅x ≥log₀,₅4
основание логарифма а=0,5. 0<0,5<1, => знак неравенства меняем
x∈(0;4]
1*2*3*4=24