Find f'(x) and find the value(s) of x where the tangent line

Last updated: 7/18/2022

Find f'(x) and find the value(s) of x where the tangent line is horizontal. f(x)=x6(x-13)7 f'(x) = Select the correct choice below and, if necessary, fill in the answer box within your choice. A. The tangent line is horizontal at x = (Use a comma to separate answers as needed.) B. The tangent line is never horizontal.