Maxima and MinimaHard

Question

Let f: R → R be defined by f(x) = . If f has a local minimum at x = - 1, then a possible value of k is

Options

A.0
B.
C.- 1
D.1

Solution

f(x) = k - 2x       if x ≤ - 1
      = 2x + 3      if x > - 1
     

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