Uh oh! Wolfram|Alpha doesn't run without JavaScript.
Please enable JavaScript. If you don't know how, you can find instructions
here
.
Once you've done that, refresh this page to start using Wolfram|Alpha.
Extrema de f(x) = x^4 - 4x^2 via test de f''
Extrema de f(x) = x^4 - 4x^2 via test de f''
Natural Language
Math Input
Extended Keyboard
