how do find the max and min . I never get it !

thaynaaaracristina
Sorry , 2014 sample paper 1 q 5
How do finf the max and min .

vanilllacookie
you differentiate to get the turning point
then you differentiate a second time and whichever value of x is greater then 0 is the min and the value less than 0 is the max
then you sub the two x values into the original equation to get two points.

themathstutor.ie
http://www.screencast.com/t/s7CMQB1EBXUh
Eamonn  TheMathsTutor.ie

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