tangent line

[jon12]

Determine the points if there are any that exist at which the graph of the function has a horizontal tangent line.
f(x)=x^4-32x+6

 

[Deleted member 4993]

Determine the points if there are any that exist at which the graph of the function has a horizontal tangent line.
f(x)=x^4-32x+6

Please show us your work, indicating exactly where you are stuck - so that we may know where to begin to help you.