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famouzgal
27.01.2020 •
Social Studies
According to this theory, sleep is a product of evolution.
(what is the theory? )
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Ответ:
The answer to your question would be restorative theory.
Ответ:
Domain is all real numbers.
The range is![\{y|y\le 6\}](/tpl/images/0200/5391/bfb30.png)
The function is increasing over
.
The function is decreasing over![(-2,\infty)](/tpl/images/0200/5391/84f26.png)
The function has a positive y-intercept.
-----------------This is a guess if I had interpreted your choices correctly:
Second option: The range is![\{y|y\le 6\}](/tpl/images/0200/5391/bfb30.png)
Third option: The function is increasing over
.
Last option: The function has a positive y-intercept.
I can't really read some of your choices. So you can read my above and determine which is false. If you have a question about any of what I said above please let me know.
Note: I guess those 0's are suppose to be infinities? I hopefully your function is
.
Step-by-step explanation:
Now since the is a quadratic then it is a parabola. We know it is a quadratic because it is comparable to
,
.
This means the graph sort of looks like a U or an upside down U.
It is U, when
.
It is upside down U, when
.
So here we have
so
which means the parabola is an upside down U.
Let's look at the range. We know the vertex is either the highest point (if
) or the lowest point (if
).
The vertex here will be the highest point, again since
.
The vertex's x-coordinate can be found by evaluating
:
So the y-coordinate can be found by evaluate
for
:
So the highest y-coordinate is 6. The range is therefore
.
If you picture the upside down U in your mind and you know the graph is symmetrical about x=-2.
Then you know the parabola is increasing on
and decreasing on
.
So let's look at the intevals they have:
So on
the function is increasing.
Looking on
the function is increasing on (-4,-2) but decreasing on the rest of that given interval.
The function's y-intercept can be found by putting 0 in for
:
The y-intercept is positive since 2>0.