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February 24th, 2019, 01:07 AM  #1 
Newbie Joined: Feb 2019 From: N/A Posts: 18 Thanks: 0 Math Focus: Calculus  Homework Check: Concavity and Second Derivative Test
Please tell me what I need to correct, otherwise thanks for helping to check my Calculus work. Attachment is below, please check to view my answers.

February 24th, 2019, 09:35 AM  #2 
Math Team Joined: May 2013 From: The Astral plane Posts: 2,157 Thanks: 878 Math Focus: Wibbly wobbly timeywimey stuff. 
This is essentially unreadable. Please repost the image right side up and fix the fuzziness. Dan 
February 24th, 2019, 08:56 PM  #3 
Newbie Joined: Feb 2019 From: N/A Posts: 18 Thanks: 0 Math Focus: Calculus  Homework Check: Concavity and Second Derivative Test
Please see and let me know if I made any mistakes on my homework, hopefully I did them all correctly. Link is below.

February 25th, 2019, 03:44 AM  #4 
Global Moderator Joined: Dec 2006 Posts: 20,629 Thanks: 2077 
Can you type your work here? Where you've obtained a numerical value in your working, how have you verified it? 
February 26th, 2019, 01:20 AM  #5 
Newbie Joined: Feb 2019 From: N/A Posts: 18 Thanks: 0 Math Focus: Calculus  Never mind, I turned it in already, no thanks to you. Can't you and others like you, do one simple task: to check my homework, to see if I did them correctly? So, don't give me more questions, just do as I requested, after all this website is suppose to help me get some response, not more questions after my initial question. P.S if you don't understand my homework, then skip me or inform others who understand this type of math work. Please stop wasting my time.

February 26th, 2019, 02:02 AM  #6  
Senior Member Joined: Oct 2009 Posts: 782 Thanks: 280  Quote:
You know we are unpaid volunteers, right? You want to boss people around, then pay them and they'll do all you want. If not, lose the attitude.  
February 26th, 2019, 03:21 AM  #7 
Newbie Joined: Feb 2019 From: N/A Posts: 18 Thanks: 0 Math Focus: Calculus  WHAT IS THIS WEBSITE FOR? Is it maybe, oh I don't know to ask and receive help, not ask and receive unhelpful responses such as: more useless questions, that the person didn't even get his/her initial question responded. So, far your an unhelpful volunteer, if you can't help then why waste my time, when I came on here to seek actual help on a math forum for obviously math related help, idiot.

February 26th, 2019, 03:17 PM  #8  
Senior Member Joined: Oct 2009 Posts: 782 Thanks: 280  Quote:
Be honest, are you crying right now or not?  
February 26th, 2019, 06:30 PM  #9 
Global Moderator Joined: Dec 2006 Posts: 20,629 Thanks: 2077  The first function mentioned was symmetrical about the line x = 0, yet your answers didn't seem to reflect that. Your image was hard to read and didn't show all of your written working. Also, you hadn't shown how some of your answers were obtained. These combined to make it difficult to know what exactly caused incorrect answers. Google can draw a graph for you, allowing you (in most cases) to see whether your numerical answers seem to be correct.


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check, concavity, derivative, homework, mikeiketube, test 
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