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Let F: R rarr R be defined by: f(x) = {:...

Let `F: R rarr R` be defined by: `f(x) = {:{(k-2x,ifxle-1),(2x+3,ifx> -1):}` If 'f' has a local maximum at x =-1 then a possible value of k is

A

1

B

0

C

`-1/2`

D

-1

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