Critical Points Question (Global Maxima and Minima) (Urgent!)

[ardentmed]

Hey guys,

Here is the problem set I'm doubting at the moment:


I checked all of my answers and here are my results:

Am I on the right track?

Thanks in advance.

 

[Deleted member 4993]

Hey guys,

Here is the problem set I'm doubting at the moment:
View attachment 4337

I checked all of my answers and here are my results:

Am I on the right track?

Thanks in advance.

You can check your answers approximately by plotting the functions.

 

[fcabanski]

The first one is correct.

Use wolfram alpha to check your answers. For the first I typed: "absolute min of x-2cosx on interval -pi to pi"