H-E-L-P Determine the extrema of below on the given interval
f(x)=5x^3-61x^2+16x+3

(a) on [0,4]
The minimum is and the maximum is .
(b) on [-9,9]
The minimum is and the maximum is

Question

H-E-L-P Determine the extrema of  below on the given interval
 f(x)=5x^3-61x^2+16x+3

(a) on [0,4]
The minimum is  and the maximum is . 
(b) on [-9,9] 
The minimum is  and the maximum is

anonymous · Answer

(a) and (b) look the same to me.
 Maximum at x=-2/15; f(-2/15)= 3.272592592592593
 Minimum at the beginning of the interval f(-2)=-85

anonymous · Answer

Find the critical points in the intervals. The extrema is located at one of the critical points or at the boundary of the interval. Compare these values and pick the largest.

anonymous · Answer

thats for the [0,4] interval?

anonymous · Answer

can someone please show me the correct answer for this problem? its saying that one of them is wrong.