Логарифмы. Решите неравенства. №28, 29. Created by Sasha9290. matematika-ru

28. lgx≥1ОДЗ: x>01=lg10lgx≥lg10основание логарифма а=10, => знак неравенства не меняем.x∈(0;10]1+ 2+ 3+4+5+6+ 7+8+ 9+ 10=5529. log₀,₅x≥-2ОДЗ: x>0log₀,₅x ≥log₀,₅4основание логарифма а=0,5. 0<0,5<1, => знак неравенства меняемx∈(0;4]1*2*3*4=24

Логарифмы. Решите неравенства. №28, 29...

Sasha9290 @Sasha9290

July 2022 1 11 Report

Логарифмы. Решите неравенства. №28, 29

Answers & Comments

kirichekov

Verified answer

28. lgx≥1

ОДЗ: x>0
1=lg10

lgx≥lg10
основание логарифма а=10, => знак неравенства не меняем.
$\left \{ {{x\ \textgreater \ 0} \atop {x \leq 10}} \right.$
x∈(0;10]
1+ 2+ 3+4+5+6+ 7+8+ 9+ 10=55

29. log₀,₅x≥-2
ОДЗ: x>0
$-2= log_{0,5}0,5^{-2}= log_{ \frac{1}{2} } ( \frac{1}{2} )^{-2} = log_{0,5}4$
log₀,₅x ≥log₀,₅4
основание логарифма а=0,5. 0<0,5<1, => знак неравенства меняем
$\left \{ {{x\ \textgreater \ 0} \atop {x \leq 4}} \right.$
x∈(0;4]
1*2*3*4=24

0 votes Thanks 1

Answers & Comments

Verified answer

2. Now write your own answers to the questions above. e.g. a) I went to New Zeal...

integraly ne slozhnye 3 5 nomer

vychislit znachenie trigonometricheskoj funkcii esli proshu raspisat vsyo ponyatno

Are these sentences true (T) or false (F)? Correct the false ones. 1. She has to...

2. Now write your own answers to the questions above. e.g. a) I went to New Zeal...

logarifmy reshite neravenstva 26 27

tex]...

x v tochke x11f6220bc5487e4bff24882797b3a440c 73500

najdite proizvodnuyu funkciipo vozmozhnosti vse nomera

reshit neravenstvo s logarifmami

рекомендуемые вопросы

Helpful Links

Helpful Social