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Решения логарифмических уравнений и неравенств:
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или -
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или -
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Let’s dive right into solving these logarithmic equations and inequalities with some flair!
For the first one,
:
Here, we can convert the logarithmic equation into its exponential form. , simplifying this leads to
. From the quadratic equation you derive, solving gives you the values for
.
Here, we can convert the logarithmic equation into its exponential form.
Next, for
:
Transforming this one too gives us . Solving for
from
leads to
. Just remember, sometimes you’ll get those unusual answers!
Transforming this one too gives us
For
:
When you have equal logs, you set the insides equal: , leading to
. Quick and easy!
When you have equal logs, you set the insides equal:
Now to
:
This means , reorganizing it gives the quadratic
. Use the quadratic formula here to find
.
This means
On to
:
With the base being less than one, this flips the inequality: . Solve for
giving you
.
With the base being less than one, this flips the inequality:
Finally,
:
Changing this also flips the inequality: . So,
, and don’t forget
from the log’s domain.
Changing this also flips the inequality:
With logarithmic equations, it’s all about understanding their properties and how to manipulate them, so keep practicing!