Asked by tony
Find the largest open intervals where the function is concave upward.
f(x)=x^4-8x^2
f(x)=x^4-8x^2
Answers
Answered by
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.
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