I'm currently taking multivariable calculus, and I'm familiar with the second partial derivative test. That is, the formula D(a,b)=fxx(a,b)fyy(a,b)−(fxy(a ... ... <看更多>

The Second Derivative test. Let's say we have a function f(x) and we want to know at what value of x it has a local maximum. ... <看更多>

If you sort the roots, you will have an alternating vector of maximums and minimums. Use the second derivative to determine if your vector of roots starts ... ... <看更多>