I added the interval they need to check this at. It is important to give the interval since on written homework they ask them to give the interval even if it is positive always. This is the rubric for written homework:
and for this rubric the problem had second derivative that was always positive so we have to be consistent and have them practice here.
https://ximera.osu.edu/mooculus/linearApproximation/exercises/exerciseList/linearApproximation/exercises/LinearApproximations3
I added the interval they need to check this at. It is important to give the interval since on written homework they ask them to give the interval even if it is positive always. This is the rubric for written homework:
and for this rubric the problem had second derivative that was always positive so we have to be consistent and have them practice here.