Answer & step-by-step explanation:
Stationary points are the points where the first derivative is equal to zero.
Let's calculate it using the power rule (exponent comes forward, decrease exponent by 1) and the fact that the derivative is a linear operation (that is ![D[a\ f(x) + b\ g(x)] = a Df(x) + b Dg(x)](https://tex.z-dn.net/?f=D%5Ba%5C%20f%28x%29%20%2B%20b%5C%20g%28x%29%5D%20%3D%20a%20Df%28x%29%20%2B%20b%20Dg%28x%29)
)
The first derivative is then
Note that the last passage is not strictly needed, but it's really helpful to find stationary points, when in this next passage we set it equal to zero. Alternatively, you can use the quadratic formula if you can pull the factors out of your head right away.
These two point could be maxima, minima, or inflection points. To check them you can either see how the sign of the first derivative goes, or check the sign of the second derivative, as you're required.
The rules states that if the second derivative evaluated in that point is negative we have a maximum, if it's positive we have a minimum, and if we have a zero we keep derivating until we get a non-zero value.
In our case, the second derivative we get by calculating the derivative again and we get 
. Evaluating it at both points we get
so -2 is a maximum and 3 is a minimum.
Answer:
y-2=3(x+7) point-slope form
Step-by-step explanation:
y-2=3(x-(-7))
y-2=3(x+7)
Answer:
6.5
Step-by-step explanation:
Im not 100% sure because I may have overcomplicated this but im going to submit this anyway.
Answer:
What percentage of pick-up truck drivers want their next vehicle purchase to be another pick-up truck?
Should the speed limit be decreased on the highway connecting two large cities?
How many pedestrians would use a walkway built over a busy road?
Step-by-step explanation:
We use samples when using an entire population is not feasible.
It is not reasonable to ask every pick-up truck driver what they want their next purchase to be; there are too many owners of pick-up trucks. This means we should use a sample.
Many people drive a highway that connects two large cities. It is not reasonable to survey every person that drives it, so we should use a sample.
On a busy road, we may have many pedestrians; this means we should use a sample instead of the entire population.
expression is equivalent to 
We apply exponential property
Multiply the outside exponent 1/2 with exponents inside the parenthesis
1/4 times 1/2 is 1/8
16 times 1/2 is 8
so expression becomes
So the answer is
