Question

Asked Mar 28, 2019

Q#3, f to h. I'm having a problem identifying the critical #s for the second derivative of H. I keep landing different answers and this affected my graph. Please clarify the problem for me. Thank you

Step 1

Note: For subpart problems, we help with only 3 subparts. But since you requested help on understanding critical points and how they would affect the graph, I'll show the work for finding critical values and will provide you the required graph along with answers of all the other sub-parts, if you have any confusion on how an answer to a particular part was obtained you can put up a new request for detailed answers for the parts you would need clarity on.

Step 2

#3:

Critical points are those points where derivative is either zero or undefined. If derivative is undefined at a point, then for that point to be a critical point, the original function must be defined at that point.

Let us start with finding the derivative of this function.

As shown below, the critical points for first derivative are x = 0 and x = 2.

Step 3

Similary, we can find critical points for second derivative (we call them potential inflection points) as shown below:

So, we get the potential inflection points (what you refer as critical numbers for second derivative) to be x=-3/2 and x = 0.

But when we check the si...

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