57 600
Assignments Done
Successfully Done
In February 2018
Your physics homework can be a real challenge, and the due date can be really close — feel free to use our assistance and get the desired result.
Be sure that math assignments completed by our experts will be error-free and done according to your instructions specified in the submitted order form.
Our experts will gladly share their knowledge and help you with programming homework. Keep up with the world’s newest programming trends.

Answer on Differential Equations Question for zirhyl kasek

Question #3713
Find the critical points and test for the maximun and minimum. y=x^3+3x^2+6x-4
Expert's answer
y=x3 + 3x2 + 6x - 4

3x2 + 6x + 6 = 0
x2 + 2x + 2 = 0
D = 4-4×1×2 < 0
There are no real solutions. Thus there is no minimum or maximum of this function on x∈R.
Let’s find the second derivative :
y'' = 2x+2 = 0
x = -1 is the inflection point.

If x < -1 then y'' < 0 graph is concave down
If x > -1 then y'' > 0 graph is concave up.

Need a fast expert's response?

Submit order

and get a quick answer at the best price

for any assignment or question with DETAILED EXPLANATIONS!


Assignment Expert
01.08.2011 06:28

D is the discrimminant of the square equation.

zirhyl kasek
29.07.2011 22:52

Thank you for answering my question. That was just what I thought but wasn't quite sure. What do you mean by D= 4-4*1*2?

Leave a comment

Ask Your question