Editing Derivative test (section)

==Further reading==
*{{cite book |first=Alpha C. |last=Chiang |author-link=Alpha Chiang |title=Fundamental Methods of Mathematical Economics |url=https://archive.org/details/fundamentalmetho0000chia_h4v2 |url-access=registration |location=New York |publisher=McGraw-Hill |edition=Third |year=1984 |isbn=0-07-010813-7 |pages=[https://archive.org/details/fundamentalmetho0000chia_h4v2/page/231 231–267] }}
*{{cite book |first=Jerrold |last=Marsden |author-link=Jerrold E. Marsden |first2=Alan |last2=Weinstein |author-link2=Alan Weinstein |title=Calculus I |location=New York |publisher=Springer |edition=2nd |year=1985 |isbn=0-387-90974-5 |pages=139–199 }}
*{{cite book |first=James E. |last=Shockley |title=The Brief Calculus : with Applications in the Social Sciences |location=New York |publisher=Holt, Rinehart & Winston |edition=2nd |year=1976 |isbn=0-03-089397-6 |pages=77–109 }}
*{{cite book |author-link=James Stewart (mathematician) |last=Stewart |first=James |year=2008 |title=Calculus: Early Transcendentals |edition=6th |publisher=Brooks Cole Cengage Learning |isbn=978-0-495-01166-8 |url-access=registration |url=https://archive.org/details/calculusearlytra00stew_1 }}
*{{cite book |first=Stephen |last=Willard |title=Calculus and its Applications |location=Boston |publisher=Prindle, Weber & Schmidt |year=1976 |isbn=0-87150-203-8 |pages=103–145 }}