Question

Find the critical numbers of the function f(x)=2sinx+x that lie in the interval (0,2pi)?

I have the answers, but not sure how to display the work.

Answer 1

well, surely you must in fact have done some work. rather than mumble some excuses, why not show what you did? Then we can analyze it for accuracy and presentability.

The critical numbers are where
f'(x) = 0
or
f'(x) is undefined.

So, what does that give you?

Answer 2

2pi