Question
Find the largest open intervals where the function is concave upward.
f(x)=x^4-8x^2
f(x)=x^4-8x^2
Answers
Steve
f" = 12x^2-16
f">0 where |x|>2/√3
That is, (-∞,-2/√3) (2/√3,∞)
Both those are intervals extending to infinity. Question is ill-posed.
f">0 where |x|>2/√3
That is, (-∞,-2/√3) (2/√3,∞)
Both those are intervals extending to infinity. Question is ill-posed.