Asked by Henry
THANK YOU TUTORS SO MUCH FOR YOUR HELP
Determine the intervals on which the function is concave up or concave down.
I finally understand that when f'' is greater than 0 it means concave up.
f(X) = 18x^2 + x^4
so I differentiate that to be
36x + 4x^3 that is f'
if I differentiate again I get:
f'' = 36+12x^2
it's from here that I get lost. At what intervals does it represent concave up or down? and what is my next step after getting f''?
Determine the intervals on which the function is concave up or concave down.
I finally understand that when f'' is greater than 0 it means concave up.
f(X) = 18x^2 + x^4
so I differentiate that to be
36x + 4x^3 that is f'
if I differentiate again I get:
f'' = 36+12x^2
it's from here that I get lost. At what intervals does it represent concave up or down? and what is my next step after getting f''?
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