Spot the one that does not belong

Exercise and reference answers

Questions

1. Items

   1. f ′(x) > 0
   2. f ′(x) < 0
   3. f increasing

   Odd item

   f ′(x) < 0

2. Items

   1. Local maximum
   2. Local minimum
   3. Point of inflexion

   Odd item

   Point of inflexion

3. Items

   1. Chain rule
   2. First derivative test
   3. Second derivative test

   Odd item

   Chain rule

4. Items

   1. f ′(c) = 0
   2. f(c) = 0
   3. f not differentiable at c

   Odd item

   f(c) = 0

Explanation