Find and classify the critical points off(x)=8x^7(3−x)^6 as local maxima and minima.

Question

(I really don't know what to after 56x^6(3-x)^6 + 8x^7 * 6(3-x)^5(-1)

Answer 1

Ok, now I continued the procedure and got, (0,neither)(3,min) and (21/13,max)