Posted by Amarjeet on .
use the second derivate test to locate the maxima and minima of y = x^2 + 2x  3

calculuss review for exam 
Steve,
since y'' = 2 any max/min will be a min.

calculuss review for exam 
Amarjeet,
what do you mean by that? :/

calculuss review for exam 
Steve,
Take a look at the explanation of the 2nd derivative test. If y'' < 0 you have a max, and if y'' > 0 you have a min where y'=0.

calculuss review for exam 
Amarjeet,
if y' = 0 doesn't that mean there is no max or min? im sorry but i really don't understand this.. please help me