Pregunta
Given functions
and
, state the domains of the following functions using
interval notation.
Domain of
Domain of
interval notation.
Domain of
Domain of
Ask by Frazier Weaver. in the United States
Jan 27,2025
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Responder
The domain of
is
.
Solución

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Extra Insights
To find the domain of
, we first need to determine the range of
. The function
is a quadratic function that opens upwards, with its vertex at
. The minimum value of
is -4, which occurs when
. Thus,
will take values from
to
.
For the function
, we require
because the square root function is defined only for non-negative numbers, and we cannot take the square root of 0 when it is in the denominator.
Now we need
for
to be defined. Solving the inequality
:
This factors as:
The solutions to this inequality are found by testing the intervals determined by the roots
and
. The function is positive for
and
.
Since we also have the restriction that
must be greater than 0, we combine the intervals where
with
.
Thus, the domain of
is
in interval notation.
So to summarize:
Domain of

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