Herewe observethat we still havethe indeterminateform. So we applyL’Hospital’s Rule againto find
the limit as follows:
L'Hospital'sRule can be usedrepeatedlyon functionslike this. It is oftenusefulbecausepolynomialfunctions
can be reducedto a constant.
LessonSummary
We learnedto examineend behaviorof functionson infiniteintervals.
We determinedhorizontalasymptotesof rationalfunctions.
We examinedindeterminateformsof limitsof rationalfunctions.
We appliedL’Hospital’s Rule to find limitsof rationalfunctions.
We examinedinfinitelimitsat infinity.
ReviewQuestions
Use your graphingcalculatorto estimate
Use your graphingcalculatorto estimate
In problems#3–10,use L’Hospital’s Rule to computethe limits,if they exist.