Question

for the function y=(x^4)/4 - 2x^2 + 4
a.) find the intervals over which y is inc/dec
b.) find the intervals over which y is concave up/down

Answer 1

okay, have you found the first and second derivative?

Answer 2

(-2,0)&(2,infinte) inc
rest dec

Answer 3

yes but the way I was doing it I was getting all intervals increasing...

Answer 4

after first derivative equation becomes x(x^2-4) =0

Answer 5

oh, i got it now! thanks!