Second Derivative Test Discriminant

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More things to try:

• 5, 12, 13 triangle
• f(n)=f(n-1)+f(n-2), f(1)=1, f(2)=2
• linear independence of {(1,3,-1), (-1,-5,5), (4,7,h)}

Cite this as:

Weisstein, Eric W. "Second Derivative Test Discriminant." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/SecondDerivativeTestDiscriminant.html

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