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Update maxMinSecondDerivativeTest4.tex #955

Open pfatheddin opened 6 months ago

pfatheddin commented 6 months ago

https://ximera.osu.edu/mooculus/maximumsAndMinimums/exercises/exerciseList/maximumsAndMinimums/exercises/maxMinSecondDerivativeTest4

There are two critical points. It is missing 4 where it does not exist. I added this and added a hint saying we can't apply the second derivative test on it.