im a little confused on this....here is my problem
f'(x) = 3x²+6x critical numbers --- x=0 & x=-2 correct?
i thought i was but i got that one lol but this problem is getting me....
f(x) = [x^(5)-5x]/5
f'(x) = x-1
i get x-1 was derivative which means critical point is x=1...back of book says critical point should be x= 1 & x= -1 ??? any help what i did wrong