April 9th, 2013, 11:20 AM  #1 
Senior Member Joined: Sep 2011 Posts: 395 Thanks: 0  Maximum and Minimum Turning Points
This question is similar to one I posted yesterday. I have found d, but I'm unsure regarding the remaining values. Can anyone help? Many thanks. Q. The function has a max point at (0, 4) and a point of inflection at (1, 0). Find the values of a, b, c & d. Attempt: ...(when (x, y) = (0, 4) ...(when x = 0) ...(when x = 1, via point of inflection (1, 0)) Ans.: (From text book): a = 2, b = 6, c = 0, d = 4. 
April 9th, 2013, 11:35 AM  #2 
Global Moderator Joined: Oct 2008 From: London, Ontario, Canada  The Forest City Posts: 7,640 Thanks: 959 Math Focus: Elementary mathematics and beyond  Re: Maximum and Minimum Turning Points
Correct up to your last line. a  3a + 4 = 0, 2a = 4, a = 2.

April 9th, 2013, 11:51 AM  #3 
Math Team Joined: Nov 2010 From: Greece, Thessaloniki Posts: 1,989 Thanks: 133 Math Focus: pre pre pre pre pre pre pre pre pre pre pre pre calculus  Re: Maximum and Minimum Turning Points [color=#000000], , . (1) (2) From (1) and (2) we get a=2 and b=6.[/color] 
April 9th, 2013, 12:43 PM  #4 
Senior Member Joined: Sep 2011 Posts: 395 Thanks: 0  Re: Maximum and Minimum Turning Points
Thanks again.


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