At what point(s) on the given curve is the tangent line horizontal?

[ttpp1124]

Homework Statement

Can someone check to see if my two points are accurate?

Relevant Equations

n/a

 

[HallsofIvy]

Yes, of course it is! You have posted several questions in which you have given detailed solutions. Wonderful! My only question is why you would feel the need to ask!

 

[ttpp1124]

Yes, of course it is! You have posted several questions in which you have given detailed solutions. Wonderful! My only question is why you would feel the need to ask!

It's always relieving and reassuring when I get a heads up from brilliant tutors online :)
Thank you!

 

[Merlin3189]

If you just want a check of a numerical solution, you could try WolframAlpha.
Local maximum:

Local minimum:

 

[HallsofIvy]

You should have more confidence in your own "brilliance".