compute the derivative of the given function and find the equation of the line that is tangent to its graph for the specified value of x=c. f(x)=2; c=13. Help I dont even know where to start :(

Question

compute the derivative of the given function and find the equation of the line that is tangent to its graph for the specified value of x=c.       f(x)=2; c=13.  Help I dont even know where to start :(

anonymous · Answer

is it really 
$$f(x)=2$$????

anonymous · Answer

the we are done with no work.  
$$y=2$$ is a horizontal line. the derivative is 0, the slope is 0, and the equation for the tangent line is 

$$y=2$$ no matter what x is

anonymous · Answer

that's what it says!

anonymous · Answer

maybe an on line class, algorithmically generated question

anonymous · Answer

I know seems weird to me too.  That is copied straight from the book.  All the examples in the book have equations but then this problem shows that..  That is why I was confused.